Question

Light of wavelength ????ph falls on a cathode plate inside a vacuum tube as shown in the figure. The work
function of the cathode surface is ϕ and the anode is a wire mesh of conducting material kept at a distance d
from the cathode. A potential difference V is maintained between the electrodes. If the minimum de
Broglie wavelength of the electrons passing through the anode is ????ₑ, which of the following statement(s)
is(are) true?
(A) For large potential difference (V >> ϕ/e), ????ₑ
is approximately halved if V is made four times
(B) ????ₑ increases at the same rate as ????ph for ????ph < hc/ϕ
(C) ????ₑ is approximately halved, if d is doubled
(D) ????ₑ decreases with increase in ϕ and ????ph

Answer 1

Sorry, I don't know......

Answer 2

Answer:

Light is measured by its wavelength (in nanometers) or frequency (in Hertz). One wavelength. equals the distance between two successive wave crests or troughs. Frequency (Hertz) equals the number of waves that passes a given point per second.