Light Reflection and Refraction

What is the speed of light in a vacuum?

• 3.00 x 10^8 m/s

• 1.50 x 10^8 m/s

• 2.00 x 10^8 m/s

• 3.00 x 10^6 m/s

Which of the following describes reflection?

• Bending of light as it passes from one medium to another

• • The bouncing back of light when it hits a surface

• The spreading of light into different colors

• The absorption of light by a surface

What is the critical angle?

• The angle at which light is completely absorbed

• The angle of incidence that results in total internal reflection

• The angle at which light refracts

• The angle at which light is emitted from a source

Which type of mirror always produces a virtual image?

• Plane mirror

• Concave mirror

• Convex mirror

• Both A and C

What happens to light when it passes from air into water?

• It speeds up

• It reflects

• It slows down

• It disappears

Which lens type is thicker in the middle than at the edges?

• Concave lens

• Plane lens

• Convex lens

• None of the above

What is dispersion of light?

• The bending of light

• The reflection of light

• The absorption of light

• The separation of light into its component colors

In a concave mirror, where is the focal point located?

• In front of the mirror

• Behind the mirror

• At the center of curvature

• At the vertex of the mirror

What type of image does a convex lens produce?

• Only real images

• Only virtual images

• Both real and virtual images

• No images

What is the formula for calculating the refractive index (n)?

• n = sin(i) / sin(r)

• n = c / v

• Both A and B

• n = v / c