NDA 2021 Physics question

Physics Ray Optics and Optical Instruments NDA 2021

Which one of the following statements is not correct for light rays ?

(A)Light travels at different speeds in different media.
(B)Light travels at almost 300 million metres per second in air.
(C)Light speeds down as it leaves a water surface and enters the air.Correct
(D)Light speeds up as it leaves a glass surface and enters the air.

Answer: (C)

Solution

Air is optically rarer than water, so light speeds up, not down, when it passes from water into air. Statement

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-031766