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    • Posted by Ananya Saklani 1 year, 11 months ago (14576182)

    CBSE > Class 07 > हिंदी
    • 1 answers

    Akshat Darak 1 year, 11 months ago (13487831)

    सेवा में प्रधानाचार्य रोहिणी, रोज़ ब्लासम पब्लिक स्कूल नई दिल्ली दिनांक : 2-2-2021 विषय – पिकनिक पर जाने के लिए अनुमति हेतु प्रधानाचार्य को आवेदन पत्र। महोदय, सविनय निवेदन है कि मैं कक्षा ग्यारहवीं का छात्र हूं। मैं समस्त छात्रों के प्रतिनिधि के रुप में आपसे यह निवेदन करना चाहता हूं कि इस बार हम सभी छात्र नये सत्र की शुरुआत एक मनोरंजक और ज्ञान वर्धक भ्रमण के साथ करना चाहते हैं। पिकनिक के आंनद के साथ पढ़ाई की शुरुआत सुखद रहेगा। अतः आपसे विनम्र निवेदन है कि आप हम सभी छात्रों को पिकनिक पर भेजने की अनुमति प्रदान करें।इस कृपा के लिए हम सभी आपके सदा आभारी रहेंगे। आपका आज्ञाकारी शिष्य मनीष छात्र प्रतिनिधि कक्षा – 4

    2 Thank You

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    • Posted by Ishan Gautam 1 year, 11 months ago (14846392)

    CBSE > Class 07 > Sanskrit
    • 2 answers

    Anushka Rath 1 year, 9 months ago (5278003)

    Kambugrivha

    0 Thank You

    Anushka Rath 1 year, 11 months ago (5278003)

    Kambugrivha 🐢🐢🐢

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    • Posted by Mayank Singh 1 year, 11 months ago (14471732)

    CBSE > Class 10 > Social Science
    • 1 answers

    Roshni Roshni 1 year, 11 months ago (12058720)

    What are the chollenges to the political parties and how to eradicate thon

    0 Thank You

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    • Posted by Shyam Yadav 1 year, 11 months ago (14846348)

    CBSE > Class 10 > Information Technology (402)
    • 0 answers
    ANSWER

    • Posted by Sreeveda Sujith Ak 1 year, 11 months ago (14510845)

    CBSE > Class 06 > Maths (OLD)
    • 2 answers

    Dayakar Yadav 1 year, 11 months ago (14849407)

    (-11) + (-12) =

    0 Thank You

    Sreeveda Sujith Ak 1 year, 11 months ago (14510845)

    Please answer

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    • Posted by Pramod Kumar Mishra 1 year, 11 months ago (14690191)

    CBSE > Class 10 > Mathematics
    • 1 answers

    Anju Anju 1 year, 11 months ago (14820043)

    Please answer

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    http://mycbseguide.com/examin8/

    • Posted by Surya Narayanan 1 year, 11 months ago (14504686)

    CBSE > Class 11 > Biology
    • 1 answers

    Arpita Yadav 1 year, 11 months ago (13362519)

    The plastids are double-membrane organelles which are found in the cells of plants and algae.

    0 Thank You

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    • Posted by Vinu . 1 year, 11 months ago (14683366)

    CBSE > Class 09 > Science
    • 2 answers

    Krishna Singh 1 year, 11 months ago (14821659)

    Always we talk g(-)

    0 Thank You

    Pooja Kumari 1 year, 11 months ago (14841127)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    • Posted by Bhumika Sharma 1 year, 11 months ago (14406907)

    CBSE > Class 03 > Mathematics
    • 5 answers

    Gitashree Rath 1 year, 3 months ago (13908491)

    Three

    0 Thank You

    Hradyansh # $En 1 year, 9 months ago (14903766)

    2 है इसका answer

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    Sweta Devi 1 year, 9 months ago (11942357)

    2

    1 Thank You

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    • Posted by Aditya Singh 1 year, 11 months ago (14804007)

    CBSE > Class 06 > Computer
    • 1 answers

    Twinkle Luthra 1 year, 11 months ago (14369246)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    0 Thank You

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    • Posted by Aditya Singh 1 year, 11 months ago (14804007)

    CBSE > Class 06 > Computer
    • 1 answers

    Seep Sonal Manhas 1 year, 11 months ago (14848662)

    Ch 3

    1 Thank You

    ANSWER

    • Posted by Aditya Singh 1 year, 11 months ago (14804007)

    CBSE > Class 06 > Computer
    • 0 answers
    ANSWER

    • Posted by Aditya Singh 1 year, 11 months ago (14804007)

    CBSE > Class 06 > Computer
    • 0 answers
    ANSWER

    • Posted by Manjula Singh 1 year, 11 months ago (14846031)

    CBSE > Class 03 > English
    • 1 answers

    Aavesh Khan 1 year, 11 months ago (13504448)

    What excited Rajveer? Why did Pranjal not share his excitement

    0 Thank You

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    • Posted by Madhu Gupta 1 year, 11 months ago (14845976)

    UP Board > Class 10 > Science
    • 2 answers

    Shivam Kumar 1 year, 10 months ago (14958872)

    Class 10 chapter 7 science

    4 Thank You

    Sadiya Gour 1 year, 11 months ago (14884135)

    Chp

    4 Thank You

    ANSWER

    • Posted by Anmol Sharma 1 year, 11 months ago (14761456)

    CBSE > Class 07 > Mathematics
    • 1 answers

    Thanvika Reddy Sagili 1 year, 11 months ago (14348517)

    150000 m square

    1 Thank You

    ANSWER
    Question 1: A lens has a refractive index of 1.5 and a radius of curvature of 15 cm for one surface and 20 cm for the other surface. Calculate the difference in curvature between the two surfaces using the lens maker's formula Question 2: A concave lens with a refractive index of 1.4 is required to have a focal length of -12 cm. Determine the radil of curvature for the two lens surfaces using the lens maker's formula. Question 3: A biconvex lens with a refractive index of 1.6 has a known focal length of 25 cm. Calculate the difference in radii of curvature for its two surfaces using the lens maker's formula. Question 4 (Easy): A plano-concave lens has a refractive index of 1.2. The radius of curvature of the curved surface is 18 cm, and the flat side has a radius of curvature of infinity, Calculate the focal length of the lens using the lens maker's formula. Question 5 (Easy): A converging lens has a refractive index of 1.6. The radius of curvature of one surface is 12 om, and the radius of curvature of the other surface is 15 cm. Calculate the focal length of the lens using the lens maker's formula.

    • Posted by Tushar Dulloo 1 year, 11 months ago (14279128)

    CBSE > Class 12 > Physics
    • 1 answers

    Krish Agrawal 1 year, 11 months ago (10271724)

    To answer each of your questions, we can use the lens maker's formula, which is given by: \[ \frac{1}{f} = (n - 1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) \] Where: - \( f \) is the focal length of the lens. - \( n \) is the refractive index of the material. - \( R_1 \) is the radius of curvature of the first surface. - \( R_2 \) is the radius of curvature of the second surface. Let's solve each of your questions: **Question 1:** Given \( n = 1.5 \), \( R_1 = 15 \, \text{cm} \), and \( R_2 = 20 \, \text{cm} \), we need to calculate the difference in curvature between the two surfaces. Using the lens maker's formula, we can calculate the focal length, and then the difference in curvature. 1. Calculate \( \frac{1}{f} \) using the formula with the given values. 2. Once you find \( \frac{1}{f} \), calculate the focal length \( f \) by taking the reciprocal. **Question 2:** Given \( n = 1.4 \) and \( f = -12 \, \text{cm} \), we need to determine the radii of curvature for the two lens surfaces. Using the lens maker's formula, you can calculate \( R_1 \) and \( R_2 \). 1. Rearrange the lens maker's formula to solve for either \( R_1 \) or \( R_2 \). 2. Plug in the known values and solve for \( R_1 \) and \( R_2 \). **Question 3:** Given \( n = 1.6 \) and \( f = 25 \, \text{cm} \), we need to calculate the difference in radii of curvature for its two surfaces. Again, use the lens maker's formula to calculate \( R_1 \) and \( R_2 \). **Question 4:** Given \( n = 1.2 \), \( R_1 = 18 \, \text{cm} \), and \( R_2 = \infty \) for a flat side, calculate the focal length using the lens maker's formula. **Question 5:** Given \( n = 1.6 \), \( R_1 = 12 \, \text{cm} \), and \( R_2 = 15 \, \text{cm} \), calculate the focal length using the lens maker's formula. For each question, perform the calculations as described above, and you will have the answers you need. If you have any specific values to calculate or encounter any issues, feel free to ask for further assistance.

    0 Thank You

    ANSWER

    • Posted by Ratan Baidya 1 year, 11 months ago (14845855)

    CBSE > Class 03 > English
    • 1 answers

    Ratan Baidya 1 year, 11 months ago (14845855)

    The word theirs refers to?

    2 Thank You

    ANSWER

    • Posted by Prathiksha Prathiksha 1 year, 11 months ago (14829225)

    CBSE > Class 07 > Mathematics
    • 3 answers

    Kanishka Manav 1 year, 11 months ago (14771985)

    20 twenty

    0 Thank You

    Thanvika Reddy Sagili 1 year, 11 months ago (14348517)

    20

    1 Thank You

    Anish Kumar 1 year, 11 months ago (13332351)

    20

    0 Thank You

    ANSWER

    • Posted by Ritupurna Padhy 1 year, 11 months ago (14649833)

    CBSE > Class 06 > Social (OLD)
    • 0 answers
    ANSWER

    • Posted by Hanuman Bhati 1 year, 11 months ago (14773646)

    Rajasthan Board > Class 06 > गणित
    • 2 answers

    Paras Kumar 1 year, 5 months ago (15555458)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    0 Thank You

    Vikram Singh 1 year, 7 months ago (14614732)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    0 Thank You

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    • Posted by Amir Sohail 1 year, 11 months ago (14644447)

    CBSE > Class 02 > General Knowledge
    • 5 answers

    Shlok Sirsat 1 year, 8 months ago (15091643)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    0 Thank You

    Shlok Sirsat 1 year, 8 months ago (15091643)

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    2 Thank You

    Anu Priya 1 year, 8 months ago (13748601)

    Chin china

    2 Thank You

    Dipali Anil Bhagwat 1 year, 9 months ago (15001874)

    China

    2 Thank You

    Prabh Kaur 1 year, 11 months ago (14867671)

    China 🇨🇳

    5 Thank You

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    • Posted by Ashwani Singh 1 year, 11 months ago (14845529)

    UP Board > Class 08 > गणित
    • 1 answers

    Sushil Kumar 1 year, 5 months ago (15520714)

    48

    0 Thank You

    ANSWER

    • Posted by Harshit Malik ... 1 year, 11 months ago (13088415)

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Uday .K 1 year, 11 months ago (14487959)

    CBSE > Class 10 > Mathematics
    • 2 answers

    Khushi Thakur 1 year, 11 months ago (14824108)

    X=7/4 and y=7/6

    0 Thank You

    Fardeen Choudhary 1 year, 11 months ago (14829288)

    4x,+8y+10 =0

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    • Posted by Harshit Malik ... 1 year, 11 months ago (13088415)

    CBSE > Class 11 > Chemistry
    • 4 answers

    Payal Singhal 1 year, 11 months ago (13556972)

    Dalton

    1 Thank You

    Harshit Malik ... 1 year, 11 months ago (13088415)

    Thanks 👍 aap sbhi ko

    1 Thank You

    Ayushi Patel 1 year, 11 months ago (13479269)

    Dalton

    1 Thank You

    Khushi Chauhan 1 year, 11 months ago (13845924)

    Dalton

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    • Posted by Shikha Singh 1 year, 11 months ago (8459238)

    CBSE > Class 10 > हिंदी ए
    • 0 answers
    ANSWER

    • Posted by Rovin Kumar 1 year, 11 months ago (14845370)

    CBSE > Class 04 > Regional Language
    • 0 answers
    ANSWER

    • Posted by Daksh Saini 1 year, 11 months ago (12922962)

    CBSE > Class 10 > Social Science
    • 3 answers

    Himanshi Chaudhary 1 year, 11 months ago (14855092)

    Berlin

    0 Thank You

    Will Rob 1 year, 11 months ago (14346896)

    Capital of Germany is BERLIN. BRUSSELS is the capital of Belgium.

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    Daksh Saini 1 year, 11 months ago (12922962)

    Brussel

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    • Posted by Shravani Fargade 1 year, 11 months ago (14702457)

    CBSE > Class 09 > Science
    • 2 answers

    Manya Yadav 1 year, 11 months ago (14680367)

    Mono atomic is Ne,He,Ar Diatomic is O2,N2,H2 and Tetra atomic is P4

    1 Thank You

    Shrishti Sharma 1 year, 11 months ago (14852294)

    Monoatomic means composed of 1 atoms in one species eg Ne, He, Ar Diatomic means composed of 2 atoms in one species O2 H2 N2 And tetratomic means composed of 4 atoms in one species S8 Thanks I hope you like the answer 😊

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