Total Internal Reflection Critical Angle

What is total internal reflection

• Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.

• Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.

• Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.

• Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.

State the name given to the change in direction of the signal at A

• total internal reflection

• reflection

• dispirsion

• refraction

State the name given to the change in direction of the signal at B

• Total internal reflection

• reflection

• dispirsion

• refraction

Give a reason why the signal changes direction at A

• its a flat surface

• the density of the glass is greater than the density of the air

• the angle of incidence is more than 90 degrees

• The density of the glass is less than the density of the air

Choose the correct statement that describes what happens to the ray of light if the critical angle is 48^o and the angle of incidence is 35^o

• refract

• totally internally reflect

• travel along the boundary

Choose the correct statement that describes what happens to the ray of light if the critical angle is 48^o and the angle of incidence is 48^o

• refract

• totally internally reflect

• travel along the boundary

Choose the correct statement that describes what happens to the ray of light if the critical angle is 48^o and the angle of incidence is 52^o

• refract

• totally internally reflect

• travel along the boundary

Choose the correct statement that describes what happens to the ray of light if the critical angle is 48^o and the angle of incidence is 60^o

• refract

• totally internally reflect

• travel along the boundary

A ray of light travels from glass to air with an angle of incidence of 35^o. If the critical angle is 42^o what will happen at the boundary?

• refract

• totally internally reflect

• travel along the boundary

• reflect

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

A ray of light travels from air to glass with an angle of incidence of 45^o. If the critical angle is 42^o what will happen at the boundary?

• refract

• totally internally reflect

• travel along the boundary

• reflect

Tags

NGSS.HS-PS4-5