Question

A sheet of copper metal (f = 4.7) is irradiated with electromagnetic radiation with a frequency of 150 nm, what is the de broglie wavelength (in m/s) of the ejected electrons? A) 1.5 × 10⁻⁷ m

B) 3.5 × 10⁻⁷ m

C) 6.0 × 10⁻⁸ m

D) 2.0 × 10⁻⁷ m

Answer 1

The question asks for the de Broglie wavelength of electrons ejected from copper when exposed to radiation. However, there is a mistake in the data provided, as frequency has been given in nm instead of Hz, and it is presumed to be a typo for wavelength.

Step-by-step explanation:

The question involves calculating the de Broglie wavelength of ejected electrons when a sheet of copper metal is irradiated with electromagnetic radiation. However, there appears to be an error or potential typo in the provided information. The frequency is given as '150 nm', which is a unit of length (nanometers) and not frequency. Frequency should be expressed in units like hertz (Hz). Assuming it is a typo and the intended meaning was radiation with a wavelength of 150 nm, we can proceed with calculations based on the energy of the photons and the work function of copper to find the velocity of the ejected electrons, and subsequently use de Broglie's equation to find the electron's wavelength.