1. What is the difference between reflection and refraction in optics?

Answer: Reflection occurs when light bounces off a surface, while

refraction occurs when light passes through a medium and changes

direction.

Rationale: Understanding the difference between reflection and refraction

is fundamental to grasping the behavior of light in optics.

2. Describe Snell's Law and explain how it relates to the phenomenon of

refraction.

Answer: Snell's Law states that the ratio of the sine of the angle of

incidence to the sine of the angle of refraction is equal to the ratio of the

refractive indices of the two mediums.

Rationale: Snell's Law governs the behavior of light as it passes through

different mediums and is crucial in understanding the refraction of light in

optics.

3. How does the speed of light change when it passes from one medium to

another with a different refractive index?

Answer: The speed of light changes when it passes from one medium to

another with a different refractive index. This change in speed causes the

light to either bend towards or away from the normal line, depending on

the relative refractive indices of the two mediums.

Rationale: Understanding how the speed of light changes when passing

through different mediums is essential for comprehending the

phenomenon of refraction in optics.

4. Define the terms focal length and focal point in optics.

Answer: The focal length is the distance between the optical center of a

lens or mirror and its focal point. The focal point is the point where light

rays converge or appear to diverge after passing through a lens or