Light and Optics Quiz

What happens to light as it passes through a glass block?

• It bends towards the normal when entering, and away when leaving

• It reflects completely off the surface

• It scatters in all directions

• It passes straight through without changing direction

Which of the following best describes refraction?

• Bending of light as it enters a new medium

• Reflection of light off a shiny surface

• Dispersion of light into a spectrum

• Absorption of light by a surface

What is the angle of incidence if the angle of reflection is 40°?

• 20°

• 40°

• 60°

• 80°

The law of reflection states:

• The angle of incidence is equal to the angle of refraction

• The angle of incidence is equal to the angle of reflection

• Light bends towards the normal when entering a denser medium

• Light reflects off all surfaces

Under red light, a white table appears:

• White

• Red

• Black

• Cyan

A blue stool under green light appears:

• Black

• Blue

• Green

• Cyan

Under blue and green light, a cyan carpet appears:

• White

• Cyan

• Black

• Blue

What causes the appearance of colours under different lights?

• The absorption and reflection of light by the surface

• The bending of light

• The speed of light in air

• The scattering of light

Which of the following would absorb all colours of light?

• White surface

• Black surface

• Red surface

• Transparent surface

In a solar eclipse, the ___ blocks light from the sun.