More to less 1

What is the critical angle for a light going from water of index 1.33 to air of index 1?

• 70.3⁰
• 48.8^o
• 20.7^o
• No critical angle

An incident ray falling from glass of index 1.5 to water of index 1.33 with an angle of incidence 50^o. Depending on the above information the light will make

• Refraction away from the Normal 
• Refracts along the surface of separation
• Total reflection
• refraction towards the Noraml

What conditions are necessary for total internal reflection to occur?

• The angle of refraction is less than the critical angle.
• The angle of incidence is greater than the critical angle.
• The angle of incidence is 0.
• The angle of reflection is the same as the critical angle.

A light beam passes from flint glass (n = 1.62) into ethanol (n = 1.36). What is the critical angle for total internal reflection of the light beam?

• 15.1°
• 26.0°
• 57.1°
• 84.0°

If the angle of incidence is equal to the critical angle, then the angle of refraction is equal 

• 0^o
• 90^o
• 45^o
• Same as angle of incidence

A light beam passes from flint glass (n = 1.62) into ethanol (n = 1.36), which of the following angle of incidence will make total reflection

• 45^o
• 57⁰
• 60^o
• 40^o

A light beam passes from flint glass (n = 1.62) into ethanol (n = 1.36), which of the following angle of incidence will refract on the surface of separation

• 45.2^o
• 57.1⁰
• 60.5^o
• 40.3^o