Question

define refraction of light and write any two law​

Answer 1

Hey here is ur answer

In physics 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

Two laws

• The incident ray, reflected ray and the normal, to the interface of any twogiven mediums; all lie in the same plane.
• The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.

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Answer 2

$\mathfrak{\large{\underline{\underline{Answer:-}}}}$

★ Retraction of light :-

The phenomenon of bending of light rays when in it travelled from a rarer to denser medium is called refraction.

★ The laws of Refraction are as following:-

• The incident ray, the refracted ray or the normal at the point of incidence all lie in the same plane.
• The ratio of sine of angle of incidence to sine of angle of refraction is constant for any two given pair of media.

The 2 nd law of refraction is also known as Snell's law of refraction.

It can be written as following :-

★ $\bold{</strong><strong>\frac{sin \: i}{sin \: r} = k \: = {n21} </strong><strong>}$

where n21 is refractive index of medium second with respect to medium first .