7.03: Light: Refraction: Brief Revision

What is C in the diagram above?

• The point of normal

• The point of incidence

• The point of refraction

• The point of reflection

What is D in the diagram above?

• The refracted ray

• The reflected ray

• The incident ray

• The normal ray

What is refraction?

• The bending of a ray of light around an object.

• The bending of a ray of light off a medium.

• The bending of a ray of light as it goes from one medium to another.

• The bending of a ray of light in the middle of a medium.

What is B in the diagram above?

• The normal at the point of incidence

• The incident ray at the point of incidence

• The perpendicular at the point of incidence

• The refracted Ray at the point of incidence

What is r in the diagram above?

• The angle of reflectance

• The angle of reflection

• The angle of refractance

• The angle of refraction

How does light behave as it enters these mediums?

• continue its path as straight line.
• bends toward the normal
• bends away from the normal
• reflects

Which one of these is the correct formula for Snells' Law? 

•  $\frac{Sin\left(r\right)}{Sin\left(r\right)}=n$  

•  $\frac{Sin\left(i\right)}{Sin\left(r\right)}=\ n$  

•  $\frac{Sin\left(i\right)}{Sin\left(i\right)}\ =\ n$  

•  $\frac{Sin\left(r\right)}{Sin\left(i\right)}\ =\ n$  

A ray of light leaves a rectangular diamond and enters air. It makes an angle of refraction of 15^o. If the refractive index of a diamond is 2.42, find the angle of incidence.

• 6.8 degrees

• 7.2 degrees

• 6.1 degrees

• 5.9 degrees

A pool of water appears to be 0.8 m deep when it is viewed perpendicularly from above. What is its actual depth? Refractive index of water = 1.33

• 1.07 m

• 2 m

• 1.08 m

• 1.09 m

A beam of light strikes a glass block with refractive index of 1.52, at an angle of 5°, what is the angle of refraction?

• 7.5^o

• 1.2^o

• 0.1^o

• 3.3^o