Question $2$

$1$ pts

In a photoelectric$-$effect experiment, the intensity of the light is increased while the wavelength, which is below the threshold wavelength, is held constant. As a result,

Neither answer.

Both answers.

The electrons are faster.

There are more electrons.

Visible light has a wavelength of about $500$ nm $.$ A typical radio wave has a wavelength of about $1\mathrm{.}0$ m $.$ How many photons of the radio wave are needed to equal the energy of one photon of visible light?

$200,000$

$20,000$

$2,000$

$2,000,000$