Question

What is the ratio of the wavelength of a photon?

• A. \( \lambda = \frac{h}{m v} \)
• B. \( \lambda = \frac{c}{f} \)
• C. \( \lambda = \frac{E}{h} \)
• D. \( \lambda = \frac{h}{E} \)

Hint:

For any photon, use the relation \( \lambda = \frac{c}{f} \) to calculate its wavelength, where \( c \) is the speed of light and \( f \) is the frequency of the photon.

Answer 1

The Correct Option is B

The photon's wavelength (\( \lambda \)) is connected to its frequency (\( f \)) by the formula \( \lambda = \frac{c}{f} \). In this equation, \( c \) represents the speed of light in a vacuum, which is \( 3 \times 10^8 \, \text{m/s} \). This relationship applies to all electromagnetic radiation, including photons.