Topic 8: Spectroscopy, Video D: Photons

Question 1

What is the equation for the energy of light?

Answer 1

= hv = hc/lambda

Question 2

What is Planck’s constant?

Answer 2

6.626 x 10^-34J-s

Question 3

Frequency is measured in what unit?

Answer 3

s-1

Question 4

Wavelength is measured in what unit?

Answer 4

Meters.

Question 5

Does red light have enough energy to overcome the bonding of electrons and kick them out?

Answer 5

No.

Question 6

Does blue light have enough energy to overcome the bonding of electrons and kick them out?

Answer 6

Yes because it has a higher frequency.

Question 7

Light is made up of particles called what?

Answer 7

Photons. Photons have frequencies.

Question 8

Higher frequency radiation has higher what?

Answer 8

Energy.

Question 9

Lower frequency radiation has lower what?

Answer 9

Lower energy.

Question 10

Shortwavelength has high what? Give examples.

Answer 10

Energy and frequency.

(X Ray, Gamma Ray, Ultraviolet)

Question 11

Long wavelength has low what? Give examples.

Answer 11

Low energy and frequency.

(Radio, Microwave, Infrared/Fire)

Question 12

True or false. The wavelength and energy of a photon are inversely proportionally.

Answer 12

True

Question 13

What is Planck’s constant?

Answer 13

h = 6.626 x 10^-34 J-s

Question 14

Energy of light is measured in what unit?

Answer 14

Joules