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Acids, Bases And Salts

Question
CBSEENSC10012887
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Define refractive index of a medium.
or
How is the refractive index of an optical medium related to the speed of light in that medium? 

Solution
Refractive index of a medium for a light of given wavelength may be defined as the ratio of the speed of light in vacuum to  the speed of light in that medium.

Mathematically, it is given by

Refractive index = Speed of light in vacuumSpeed of light in medium = cv

Some More Questions From Acids, Bases and Salts Chapter

What is meant by the optical image of an object?

What are real and virtual images? Can these images be obtained on a screen? Give reasons in support of your answer.

Give three points of differences between real and virtual images.

What is a mirror? Mention the different types of mirrors commonly used.

Define the following terms in connection with reflection of light:
Incident ray, reflected ray, point of incidence, normal, angle of incidence and angle of reflection.

State the laws of reflection of light.

Are the laws of reflection applicable to plane surfaces also valid for curved surfaces?

State the important properties of images formed by plane mirrors.

What is lateral inversion of an image ? What is the cause of lateral inversion?

What is a spherical mirror? What are the two different types of spherical mirrors?

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