Refraction - Critical angle

if angle of incidence is greater than critical angle

• refraction of light

• angle of refraction is 90^o

• total internal reflection

• none of the above

if angle of incidence is equal to critical angle

• refraction of light

• angle of refraction is 90^o

• total internal reflection

• none of the above

if angle of incidence is less than critical angle

• refraction of light

• angle of refraction is 90^o

• total internal reflection

• none of the above

The condition for total internal refection

• light must travel from denser to rarer medium

• light must travel from rarer to denser medium

• angle of incidence is lesser than critical angle

• angle of incidence is greater than critical angle

Which colour of light has a higher crictical angle?

red or green light

• red

• green

Draw a diagram of a right angled isosceles prism which is used to make an inverted image erect.

Is there a loss of energy during total internal reflection?

• yes

• no