Topic 8: Spectroscopy, Video C: Wave Properties

Question 1

Light is scientifically known as what?

Answer 1

Electromagnetic radiation (EM).

Question 2

What is a wavelength?

Answer 2

The distance between 2 consecutive troughs or peaks in a wave.

Question 3

What is frequency?

Answer 3

Number of waves that pass a given point per second.

Question 4

Frequency (cycles per second) is measured in what unit?

Answer 4

Hertz.

Question 5

What is amplitude?

Answer 5

Amplitude is the height of the wave as defined by a trough or a peak.

Question 6

The brightness of light is related to what aspect of it’s wave.

Answer 6

Amplitude.

Question 7

True or false. Wavelength and frequency are inversely proportional.

Answer 7

True.

Question 8

Wavelength times frequency equals what?

Answer 8

c, the speed of light. (3 x 10⁸ m/s)

Question 9

The wavelength of a light defines it’s what?

Answer 9

It’s color.

Question 10

Blue light has a shorter wavelength than red light or red light has a shorter wavelength than blue light?

Answer 10

Blue light has a shorter wavelength than red light.

Question 11

What is the equation for wavelength and frequency?

Answer 11

c=(lambda)(v)

v=frequency

Lambda=wavelength (in meters)

c=speed of light (3 x 10^8)