CBSE > Class 12 > Physics | CBSE Board | Homework Help

Total Internal Reflection is a scenario where a travelling wave of light strikes a boundary of a medium but at an angle that is larger than critical angle. So, the concept behind is that if the refractive index on the other side of the boundary of the medium is lower, and the light wave strikes at greater angle, so the wave is reflected internally entirely. Total internal reflection is a basic concept used in variety of applications for fast travelling of light rays. Total Internal Reflection can also be extended onto various concepts that are arose out of it like frustrated total internal reflection or evanescent waves which are the special cases of this phenomena.

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What are the changes introduce by cbse for 2019 ??????

Posted by Sneha Bansal 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Navya Singh 6 years, 11 months ago

In chem physics bio ..value based ques is not coming this yr ...also the choice is increased to 33% in all subjects

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Aditi Varshney 5 years, 8 months ago

There is only change in english

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Nuclear force

Posted by Vansh Graphics 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Àñshul Shärmã 6 years, 11 months ago

Forces that binds the proton and neutrons into the atomic nuclei

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What is super position principle?

Posted by Muskan Roy 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

The superposition principle states that for a linear force system, the resultant force acting on a body is equal to the vector sum of all the individual stimulus. In Coulomb’s law the stimulus would be electrostatic force which depends upon the magnitude of charge and the distance between two charges. The superposition principle is helpful when there are large number of charges in a system.

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Ripple frequency??????

Posted by Amrendra Bahubali 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Amrendra Bahubali 6 years, 11 months ago

Plzz tell formula tu find ripple frequency of full wave rectifier and half wave rectifier... Do they have any difference

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Yogita Ingle 6 years, 11 months ago

It is the frequency of the residual AC voltage after it has been rectified to DC in a power supply. It rides on top of the DC voltage. For a half-wave rectifier, the ripple frequency is the same as the AC frequency, for a full-wave one it is twice the original AC frequency.

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Stae the two kirchoffs rules used in ekectric networks?how are these rules justified.

Posted by Saurav Chaudhary 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Santoshee Prajapati 6 years, 11 months ago

Junction and loop rule

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what is the equivalent resistance between points a and b

Posted by Arham Kothari 6 years, 11 months ago

CBSE > Class 12 > Physics

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Temperature coefficient of resistivity

Posted by Sushrit Ghimire 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 6 years, 11 months ago

Temperature coefficient Magnetism of resistance is numerically equal to the change in resistance of a wire of resistance 1Ω at 0^∘C when the temperature changes by 1^∘C .
This property of metals is used in making resistance thermometers.

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Septima Ravenclaw 6 years, 11 months ago

R=R。(1-aT)

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Quantization of charge

Posted by Pankaj Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Manish Jaat 6 years, 11 months ago

The charge on any body is equals to the integral multiple of charge of electron

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Why Silicon same as a diamond crystal

Posted by Atul Ji Sharma 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery. CBSE 2018 ALL INDIA???

Posted by Yo Yo Honey Singh ? 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Manish Jaat 6 years, 11 months ago

1 uv rays 2.uv rays

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Noel Raeuter 6 years, 11 months ago

A. Uv rays B. Infrared rays

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What is the physical significance of electric field?

Posted by Ayush Kumar Gupta 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Mohan Singh 6 years, 11 months ago

It gives us direction of force acc to relation E=FE in vectors

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Please tell me that in class 12 i should study from which book now i am in class 11

Posted by Muneeb Ali 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Mohan Singh 6 years, 11 months ago

U should only refers to tution or school notes and if u want to refer sl arora and near boards exam u should refer arrihant

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activity file

Posted by Ritik Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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In the topic electric flux , does the plane of surface indicate unit normal vector to the plane

Posted by Krishnendu S K 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Which. Type of transformer is preffer and why

Posted by Vikas Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Aditi Varshney 6 years, 11 months ago

Vikas...kindly write the full ques

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Does anyone know the board practical dates for physics and chemistry?

Posted by Shrey Shekhar 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Gautãm . 6 years, 11 months ago

16th January, Maybe!

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Shriya Gautam 6 years, 11 months ago

Dates are decided by the external who is appointed to come to ur school to take ur practical

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Any two applications of x- ray

Posted by Monisha Prem Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Sanu Singh 6 years, 11 months ago

1- For medical purposes in the examination of bones. 2- To study about molecular structures by x ray diffraction.

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Pawan Kumar Thakur 6 years, 11 months ago

What is physic

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What is polarising angle

Posted by Akash Maurya 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Krishnendu S K 6 years, 11 months ago

The angle of incidence at which a beam of unpolarised light falling on a transparent surface is reflected as a beam of completely plane polarised light is called polarising angle or brewsters angle

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Derive the reflection between the critical angle and reflective index

Posted by Jaish Raza 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Rajan Baghel 6 years, 11 months ago

both are different for different medium

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Write two application of x-ray

Posted by Unaiza Fathima 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Shashikant Kumar 6 years, 11 months ago

Application of x-ray :- 1. In surgery 2. In radiotherapy

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Explain Faraday's law

Posted by Hrithik Paswan 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Surabhi Tiwari 6 years, 11 months ago

First law- whenever there is a change in magnetic flux linked with a coil , an emf is induced in the coil. Second law- The induced emf is proportional to the rate of change of magnetic flux linked with the coil.

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Why is kirchoff 1st law based on conservation of charge

Posted by Krishnendu S K 6 years, 11 months ago

CBSE > Class 12 > Physics