Question

In the photoelectric effect experiment we use a Hg lamp to shine a light on a metal surface encased inside a photocell. There are multiple filters mounted on the front of the photocell to help us separate the light from the lamp into single-wavelength beams. Which of the following statements is true? Select one: a. Without the filters the photoelectric effect will still happen, but we will have no way to determine which electron was ejected by which photon wavelength. b. Even if we had monochromatic light source, we would still need filters to separate its constituent wavelengths. c. Without the filters the photoelectric effect cannot occur. d. Knowing the wavelength of the incoming photons does not help us determine the energy of the ejected electrons.

Answer 1

Option A is correct.

Because if we used a filter then we know the wavelength of that photo that comes from filter . As we know that Hg lamp have a large range of photo wavelength. That the reason to us the filter in this experiment. As we can see below their will be a huge range of wavelengths. That the use filter.