In the photoelectric effect,electrons are ejected from metals if the incident light has a certain minimum:

Which of the following phenomena exhibits the particle nature of light?

For most metals, threshold frequencies lie in which region?

The work function of aluminium is $4.2 \ eV$. If two photons, each of energy $3.5 \ eV$, strike an electron of aluminium, then the emission of electrons will be:

The electrons are emitted in the photoelectric effect from a metal surface:

Which figure shows the correct variation of applied potential difference $(V)$ with photoelectric current $(I)$ at two different intensities of light $(I_1 < I_2)$ of the same wavelength?