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skg94
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Homework Statement
1. Explain the effects
To the photocurrent as the light intensity increases
To the photocurrent as the frequency of the light is increased
To the speed of the photoelectrons as the radiation intensity increases
To the speed of the photelectrons as the radiation frequency increases
2. Radiation with a frequency of 6.67 * 10^14 Hz is used to illuminate a photoelectric surface (W=2.50eV). The ejected electrons are now deflected by a perpendicular magnetic field (B=3.11*10^-5T). What is the maximum radius of these deflected electrons? [ANS: 5.57 * 10^-2m ]
Homework Equations
Ek = hf-W
W=hfo
c=f (lambda - wavelength)
The Attempt at a Solution
1.a) more current
b) nothing
c) increases speed
d) increases speed - i don't really know how do i solve this? some help here
2. I really have no idea
i got E, from E=hf-W = 4.2221 *10^-20, but i don't know how to fuse B with E to find radius, maybe Fm=Fc? but so many unknowns.