Critical Angle

What happens to light during total internal reflection?

• The angle of incidence is greater than the critical angle.

• The angle of reflection is the same as the critical angle.

• The angle of refraction is less than the critical angle.

• The angle of incidence is zero.

Tags

NGSS.HS-PS4-5

When angle of incident (i) equals to critical angle (c) if light is traveled from a denser medium to a less dense medium,

• total internal reflection occurs.

• angle of refraction is equal to 90 degree.

• light is refracted out

• light travel in straight line

Chose the TWO conditions are NOT correct for total internal reflection to take place

• The incident angle should be less than the critical angle

• The incident angle should be greater than the critical angle

• Light should travel from a denser to a lighter medium

• Light should travel from a lighter to a denser medium

If Total Internal Reflection occurs the light will bounce back at the same angle it came in

• True

• False

Tags

NGSS.HS-PS4-5

Light travels from glass (n=1.66) to water, what is the critical angle for these two mediums?

• 53.2

• 48.8

• 37

• not possible

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

• Total internal reflection

• reflection

• dispirsion

• refraction

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

• total internal reflection

• reflection

• dispersion

• refraction

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