Question

(A) What is refraction?

(B) Describe how a ray of light is refracted when it passes through a grass block.

Class 7​

Answer 1

Answer:

Refraction of light is the phenomenon of change in the path of light in going from one medium to another.

Light is refracted when it crosses the interface from air into glass in which it moves more slowly. Since the light speed changes at the interface, the wavelength of the light must change, too. The wavelength decreases as the light enters the medium and the light wave changes direction.

Answer 2

Question:-

(A) What is refraction?

(A) What is refraction?(B) Describe how a ray of light is refracted when it passes through a grass block.

Answer:-

(A) »» refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium. Refraction of light is the most commonly observed phenomenon, but other waves such as sound waves and water waves also experience refraction.

(B) »» When light passes from air through a block with parallel sides, it emerges parallel to the path of the light ray that entered it. Refraction explains why an object appears to bend when it goes through water.