Question

Question 8 (1 point)
A group of students is investigating the behavior of light. They test how the path of the light changes as it passes from one object to another of a different shape or medium. Which of the following would most likely cause a beam of light to increase in wavelength and bend away from the normal?

a
passing from a water faucet into a bathtub of water
b
passing from a round glass into a square glass
c
passing from air into glass
d
passing from glass into air
Question 9 (1 point)
A blue light is shined on objects X and Y. Object X appears to be blue, and object Y appears to be black. Which of the following is correct?

a
Object X must be black, and object Y must be blue
b
Object X must be blue, and object Y must be black.
c
Object X reflects blue light, and object Y absorbs blue light
d
Object X absorbs blue light, and object Y reflects blue light.

Answer 1

Q8: d — passing from glass into air.
Reason: Light speeds up (wavelength increases) when going from a higher to lower refractive index and bends away from the normal.

Q9: c — Object X reflects blue light, and object Y absorbs blue light.
Reason: Under blue illumination, a blue object reflects blue wavelengths; a black-appearing object absorbs the incident light.