11/15/22 - The Nature of Light

Question 1

What is frequency (v)?

Answer 1

The number of complete waves or cycles that pass by a point per second, expressed in units of s^-1

Question 2

What is wavelength (λ)?

Answer 2

The distance from crest to crest or trough to trough on a wave, often expressed in nm.

Question 3

What is the equation for frequency when given wavelength and speed of light (c)?

Answer 3

v = c/λ

Question 4

What is the equation for wavelength when given frequency and speed of light?

Answer 4

λ = c/v

Question 5

Will a wave with high frequency have a long or short wavelength?

Answer 5

Short wavelength

Question 6

Will a wave with a long wavelength have a high or low frequency?

Answer 6

Low frequency

Question 7

Will waves of radiation with higher amplitude be more or less intense?

Answer 7

More intense

Question 8

What is the order of types of electromagnetic radiation from high to low frequency?

Answer 8

Gamma rays, x-rays, ultraviolet, visible light, infrared, microwave, radio

Question 9

What is refraction?

Answer 9

When a wave changes speed, and therefore direction, as it enters a new medium.

Question 10

What is diffraction?

Answer 10

When a wave striking the edge of an object bends around it. A wave passing through a slit as wide as its wavelength forms a circular wave.

Question 11

What is blackbody radiation?

Answer 11

When a solid object is heated to high temperatures, it gives off electromagnetic radiation, including visible light.

Question 12

What is the photoelectric effect?

Answer 12

When metals emit electrons when exposed to light. The light must have a minimum frequency.

Question 13

Does higher frequency mean higher or lower energy?

Answer 13

Higher energy

Question 14

How does an atom change its energy state?

Answer 14

By emitting or absorbing quanta of energy as photons