Question

What is refraction of light?State two laws of refraction of light​

Answer 1

Answer:

Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.

Laws of refraction:-

(i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.

(i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.(ii) The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is also known as Snell’s law of refraction.

(i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.(ii) The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is also known as Snell’s law of refraction.If i is the angle of incidence and r is the angle of refraction,

μ2 = sin r/sin i.

Answer 2

$\underline{\underline{\huge\mathbb{\orange{A}\green{N}\orange{S}\green{W}\orange{E}\green{R}}}}$

➝ The change in direction of light when it passes from one medium to another obliquely,is called refraction of light.

• In other words,the bending of light when it goes from one medium to another obliquely is called refraction of light.

⸕ The two laws of refraction are :-

✎ The Incident ray,refracted ray and normal at the point of incidence all lie in the same plane.

✎ The ratio of sine of angle of incidence to the sine of angle of refraction is constant for a given pair of medium such as air and glass or air and water.

$\rm\:\dfrac{Sine\:of\:angle\:of\:incidence}{Sine\:of\:angle\:of\:refraction} = constant$

or,

• $\rm\:\dfrac{sin\:i}{sin\:r}=constant$