Photoelectric effect and radioactivity

Question 1 of 10

The energy of a photon is given by

Question 2 of 10

The threshold wavelength of a metal with work function 3.0 × 10⁻¹⁹ J is about (h = 6.6 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s)

Question 3 of 10

The minimum energy needed to remove an electron from a metal surface is the

Question 4 of 10

The energy of a photon of frequency 5 × 10¹⁴ Hz is (h = 6.6 × 10⁻³⁴ J s)

Question 5 of 10

Which radiation is stopped by a sheet of paper?

Question 6 of 10

After 3 half-lives, a sample has 25 g left. Its initial mass was

Question 7 of 10

The half-life of a radioactive isotope is the time for

Question 8 of 10

In the photoelectric effect, increasing the light intensity increases the

Question 9 of 10

Photoelectrons are emitted only if the light's frequency is above the

Question 10 of 10

A beta particle is