Physics

1The minimum energy needed to remove an electron from a metal surface is the

2Which radiation is stopped by a sheet of paper?

3In the photoelectric effect, electrons are emitted from a metal surface only when

4Which radiation is the most penetrating?

5In the photoelectric effect, increasing the light intensity increases the

6The radiation with the greatest penetrating power is

7A beta particle is

8The 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)

9The energy of a photon is given by

10Photoelectrons are emitted only if the light's frequency is above the