# Physics

A ray of light enters a glass block from air at an angle of incidence of 50 degrees. The angle of refraction is 30 degrees. What is the refractive index of the glass?
What is the value of critical angle for this glass?

Thank you :)

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. n = sini/sinr =sin 50o/sin 30o =0.766/0.5 = 1.53.

n = sini/sinr =sin 50o/sin 30o =0.766/0.5 = 1.53
α = arcsin (n1/n2) = arcsin (1/1.53) = 40.81o.

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

1. ### physics

a ray of light (f = 5.09 x 10^14 Hz) traveling in air strikes a block of sodium chloride at an angle of incidence of 30 degrees. What is the angle of refraction for the light ray in the sodium chloride?

2. ### Physics

A ray of light of vacuum wavelength 550 nm traveling in air enters a slab of transparent material. The incoming ray makes an angle of 34.3◦ with the normal, and the refracted ray makes an angle of 18.9◦ with the normal. Find

3. ### Physics

An aquarium filled with water has flat glass sides whose index of refraction is 1.48. A beam of light from outside the aquarium strikes the glass at a 43.5º angle to the perpendicular . The angle this light ray enters the glass

4. ### physics

A ray of light traveling in air strikes the surface of a liquid. If the angle of incidence is 33.5◦ and the angle of refraction is 19.8◦, ﬁnd the critical angle for light traveling from the liquid back into the air. Answer

1. ### Physics

a ray of light strikes a flat, 2-cm thick block of glass(n=1.5) at an angle of 30 degrees with respect to the normal. find the angle of refraction at the top surface. find the angle of incidence at the bottom surface and the

2. ### physics

a ray of light in air enters a glass surface at right angles to the surface. what is the angle of refraction

3. ### physics

Red light (n = 1.520) and violet light (n = 1.538) traveling in air are incident on a slab of crown glass. Both colors enter the glass at the same angle of refraction. The red light has an angle of incidence of 26.50°. What is

4. ### physics

The angle of refraction of a ray of light traveling through a piece of flint glass is 24°. Find the angle of incidence.

1. ### Physics

A light ray in air is incident on a water surface at a 44° angle of incidence. Find each of the following angles. (b) the angle of refraction °

2. ### physics

1.A beam of light passes through the air and enters a diamond at an angle of incidence of 40 degrees. Use Snell’s Law to find the angle of refraction of the diamond. (Index of refraction for air is 1.00 and the index of