Question

-True or false:

More current flows when higher frequencies of light are shone onto a metal (assume the light will cause electrons to flow in the first place).

Hint: Consider: is current the same thing as kinetic energy?

-Note: Use h = 4.136 x 10^-15 eV

A photon of f = 10 x 10^15 Hz hits a metal with ϕ = 1 eV. What is the kinetic energy of the flowing electrons?

a) 1.42 eV

b) 2.42 eV

c) -0.98 eV

d) 1.51 x 10^49 eV

-True or False:

We can know EXACTLY where a photon will hit the screen in an experiment.

-True or False:

Wave packets have a precise, exact shape and we know everything about them exactly.

-True or False:

If an object has a mass , it would have a rest-mass energy of  when it is not moving.

-True or False:

Answer 1

True, if the light is flowing in the first place than by increasing frequency you essentially increase the kinetic energy of the electron which result in increase of current.

True , you can know about the exact location about where the photon will strick with in the limits of heisenberg uncertainty principle.

False. We dont know about size and shape about the wave packet we only know it is quantized and each have a energy dependent upon its frequency.

True all the particale with mass have a rest mass energy which is sometimes referred as there internal energy/ potential energy.

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