The Electron (Leaving Cert Physics): Quizzes

Emission of electrons from metal by EM wave

1921

Min. energy to remove electron from metal

Min. freq. below which no electrons emitted

UV light shining on zinc plate

Directly proportional to intensity

Caesium

Existence of threshold frequency

$E = hf$

$\frac{1}{2}mv_{max}^2 = hf - \phi$

$f_0 = \frac{\phi}{h}$

Number of electrons emitted per second

$6.6 \times 10^{-34}$ J·s

Image sensors in digital cameras

Planck's constant ($h$)