1.3 Photons

Question 1

Calculate PHOTON ENERGY

Answer 1

E = hf
Energy = Plank's constant x frequency of photons

Question 2

Define a PHOTON

Answer 2

a packet of EM waves

Question 3

Calculate wavelength of EM RADIATION (EM WAVES)

Answer 3

λ = c/f

Wavelength = wave speed in vacuum / wave frequency

Question 4

When are photons created?

Answer 4

• when a fast moving charged particle is stopped or slowed down
• excitation and de-excitation of electrons