Booklet 2A - Particles (Equations)

Question 1

(Define symbols and units)

Answer 1

W - work done (J)

Q - charge (C)

V - potential difference (V)

Question 2

(Define symbols and units)

Answer 2

E - Energy (J)

m - mass (kg)

c - speed of light (ms^-1)

Question 3

(Define symbols and units)

Answer 3

E - photon energy (J)

h - Planck’s constant (See Data Sheet - J s)

f - photon frequency (Hz)

Question 4

(Define symbols and units)

Answer 4

E_k - kinetic energy of emitted electron (J)

h - Planck’s constant (see data sheet - J s)

f - light/photon frequency (Hz)

f_o - thershold frequency (Hz)

Also

hf is photon energy (J)

hf_o is work function (J)