Calculate the kinetic energy of ejected photoelectrons and the stopping potential, given incident light wavelength and work function.

Here's the solution to the problem:

Part (a) Kinetic energy of the ejected photoelectrons.

Step 1: Identify the given values and constants.

• Wavelength of incident light, $\lambda = 3.0 \times 10^{-7} \, \text{m}$
• Work function for sodium metal, $\phi = 2.46 \, \text{eV}$
• Charge of an electron, $e = 1.6 \times 10^{-19} \, \text{C}$
• Planck's constant, $h = 6.63 \times 10^{-34} \, \text{J} \cdot \text{s}$
• Speed of light,