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NCERT Science

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Questions and Answers

What is the speed of light in a vacuum?

300,000,000 meters per second

200,000,000 meters per second

299,792,458 meters per second (correct)

250,000,000 meters per second

What happens when light passes from air into glass?

It disappears

It slows down (correct)

It remains at the same speed

It speeds up

What is the primary color of light?

Green

Black

Red

White (correct)

Study Notes

Light Fundamentals

The speed of light in a vacuum is 299,792,458 meters per second (m/s).
When light passes from air into glass, it slows down and bends due to the change in medium, a phenomenon known as refraction.
The primary color of light is white, which is composed of all the colors of the visible spectrum.

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Description

Test your knowledge of light with this quiz based on the NCERT science book's light chapter. Explore questions about the speed of light in a vacuum, the phenomenon of light passing from air into glass, and the primary colors of light. See how much you know about this fascinating topic!