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Refraction of Light (includes Refraction through Rectangular Glass Slab) Video Lecture - Class 10

FAQs on Refraction of Light (includes Refraction through Rectangular Glass Slab) Video Lecture - Class 10

1. What is refraction of light?

Ans. Refraction of light is the bending of light when it passes from one medium to another medium of different optical density. This bending occurs due to the change in speed of light as it travels from one medium to another.

2. How does refraction through a rectangular glass slab occur?

Ans. When light passes through a rectangular glass slab, it undergoes refraction twice. The first refraction occurs as the light enters the glass slab, and the second refraction occurs as the light exits the glass slab. The light bends towards the normal when entering the glass slab and away from the normal when exiting, resulting in a deviation of the light ray.

3. What is the role of the refractive index in refraction of light?

Ans. The refractive index of a medium determines how much the light will bend while passing through that medium. It is a measure of the speed of light in a particular medium. The higher the refractive index, the more the light bends. Refractive index is defined as the ratio of the speed of light in vacuum to the speed of light in the medium.

4. How does the angle of incidence affect the angle of refraction?

Ans. According to Snell's law, the angle of incidence and the angle of refraction are related. When light passes from one medium to another, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This constant is known as the refractive index. Therefore, the angle of refraction depends on the angle of incidence.

5. What are the applications of refraction of light in everyday life?

Ans. Refraction of light has various practical applications in everyday life. Some examples include the working of lenses in glasses, cameras, and telescopes, the formation of rainbows, the functioning of optical fibers in communication systems, and the correction of vision using contact lenses and glasses.

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Oct 10, 2025 Last updated

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