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The optical centre of a lens is a point on the principal axis of the lens, such that a ray of light passing through it goes undeviated.
Optical centre: It is the geometrical centre of the lens.

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Anand Kumar 5 years, 3 months ago

The special point, on the principal axis of a a lens, through which light passes without undergoing any 'beding'or devotion

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Explain metallic minerals

Posted by Meghna Dhang 5 years, 3 months ago

CBSE > Class 08 > Social Science

3 answers

Neeyati Rana 5 years, 3 months ago

Minerals which contain metal is known as metallic mineral

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Ritika Talwar 5 years, 3 months ago

∆Metallic minerals contain metal in raw form . ∆Properties :- 1. They are hard 2. They have luster 3. They have shine 4. They conduct heat and electricity ∆Example - Iron ore , Bauxite , manganese etc. ∆Metallic minerals are of two types :- 1. Ferrous 2. Non - ferrous Furious minerals - they contain iron . Non furious minerals - they does not contain iron but they may contain some other metals .

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Khushboo Chaudhary 5 years, 3 months ago

Minerals which contains metal is known as metallic minerals

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How thermosetting plastics are different from thermoplastic s

Posted by Priya Ms 5 years, 3 months ago

CBSE > Class 08 > Science

2 answers

Vishesh Gautam 5 years, 3 months ago

yes

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Pranav Sapkal 5 years, 3 months ago

Thermoplastic became soft on heating whereas thermosettingplastic donor became soft on heating

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Who invented even numbers

Posted by Nakkewar Sri Chandaba 5 years, 3 months ago

CBSE > Class 08 > Mathematics

1 answers

Harkanwal Aujla 5 years, 3 months ago

Human being found the even number ?????

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Lesson 10 ashok vanika abhyas

Posted by Shreya Bharwal 5 years, 3 months ago

CBSE > Class 08 > Sanskrit

1 answers

Vivan Harani 5 years, 3 months ago

gzbzvoz hoz lhzoh

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What us 3x÷5= 50

Posted by Saanvi Govind 5 years, 3 months ago

CBSE > Class 08 > Mathematics

2 answers

Kumkum Mandal 5 years, 3 months ago

3x÷5=50 3x= 50×5 3x= 250 x= 250/3 =>83.33

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Anushka Chahar 5 years, 3 months ago

3x=50×5= 3x=50 X=50÷3 X=16.666

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Editing and omitting following passage he not been edited. 1. He asked to go down to the end of. 2.He garden. He was also to dip in the water of the river there. The same 3. Water was and sprinkled over everything. 4. Which had changed into gold by mida ' s ' 5. Touch.the king felt a weight had lifted from him.

Posted by Manish Kumar 5 years, 3 months ago

CBSE > Class 08 > English

0 answers

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What do you mean by dharmashastra

Posted by Prabha Kumari 5 years, 3 months ago

CBSE > Class 08 > Social Science

1 answers

Anvi Garg 5 years, 3 months ago

A Brahmanical collection of rules of life often in the form of a metrical law book.

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Why did the Powhatans not liked settler

Posted by Aditya Kumar Singh 5 years, 3 months ago

CBSE > Class 08 > English

0 answers

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Ratio of radius of curvature to that of focal length

Posted by Ananditha Bharadwaj 5 years, 3 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 3 months ago

The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature. It is important to note up front that this is an approximately true relationship. Analytically, the focal length is described by the lens maker's equation: 1/f = (n - 1)(1/R1 + 1/R2), where R1 and R2 are the radii of curvature, f is the focal length, and n is the index of refraction. Verify that your earlier measurements are consistent with this equation.

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Square 9801

Posted by Naman Goswami 5 years, 3 months ago

CBSE > Class 08 > Mathematics