Question

Which of the following leads a photon to have greater energy?

• A. A photon with a larger wavelength.
• B. A photon with a lesser speed than that of light.
• C. A photon with a smaller wavelength.
• D. By making the photon to move through a denser medium.

Answer 1

The correct option is C A photon with a smaller wavelength.

We know that, energy of a photon is given by,

$E=\frac{1240}{\lambda \left(\text{in nm}\right)}\text{eV}$

So, from the formula it is clear that, smaller wavelength of the photon results in greater energy.

Hence, option $\left(C\right)$ is the correct answer.