# Physics

posted by .

What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal? The refractive index of water is 1.333.

I don't even know how to start this or what the formula is. Thanks for your help in advance. It really is appreciated.

• Physics -

Snell's law:

n1 Sin(theta)=n2 Sin(thea)

Index of refraction of air (n1)=1.00
angle of incidence is 45 to the normal (sin theta)

Index of refraction of lake (n2)=1.33

solve for theta

• Physics -

Okay so then 1(sin45) = 1.33(sinx)

I got 32.04degrees?

• Physics -

n1 Sin(theta)=n2 Sin(theta)

Index of refraction of air (n1)=1.00
angle of incidence is 45 to the normal (sin theta)

Index of refraction of lake (n2)=1.33

solve for theta

(1.00/1.33)sin45=sin(theta)

0.544=sin(theta)

sin-1 (0.544)=theta

33.0 degrees=theta

• Physics -

I got 32.1 degrees. The problem worked out should read

0.532=sin(theta)

sin-1 (0.532)=theta

32.1 degrees=theta

• Physics -

Thank you so much

## Similar Questions

1. ### Physics

1) The speed of light in a certain liquid is 3/5 the speed in a vacuum. What is the index of refraction of the liquid?
2. ### Physics

1) The speed of light in a certain liquid is 3/5 the speed in a vacuum. What is the index of refraction of the liquid?
3. ### physics

What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal?
4. ### Physics

What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45 degrees to the normal?
5. ### Physics Word Problem

using Snell's Law (sin(theta1)/sin(theta2) = v1/v2 where (theta1) is the angle of incidence and (theta2) is the angle of refration. The number V1/V2 is called the index of refraction. The index of refraction from air to water is 4/3. …
6. ### Physics Word Problem

using Snell's Law (sin(theta1)/sin(theta2) = v1/v2 where (theta1) is the angle of incidence and (theta2) is the angle of refration. The number V1/V2 is called the index of refraction. The index of refraction from air to water is 4/3. …
7. ### Physics

Two light rays, one red and one violet, encounter a glass surface. If the index of refraction of the red light ray = 1.52, the index of refraction of the violet light ray = 1.54, and the angle of incidence = 30 degrees, calculate the …
8. ### science

A ray of light travelling in air strike the water surface at an angle of 40° calculate the refractive index of water if angle of refraction is 29°
9. ### science

A ray of light travelling in air strikes the water surface at an angle of 30 degree calculate the angle of refraction if refractive index of glass is 1.5
10. ### science

A ray of light travelling in air strikes the water surface at an Angle of 30 degree calculate the Angle of light refraction if refractive index of glass is 1.5

More Similar Questions