Author Question: A photon has energy of 4.20 eV. To what wavelength does this energy correspond? A) 321 nm ... (Read 57 times)

vHAUNG6011 · **on:** Jul 29, 2018

A photon has energy of 4.20 eV. To what wavelength does this energy correspond?

A)

321 nm
B)

103 nm
C)

296 nm
D)

412 nm
E)

420 nm

Question 2

What is the meaning of the term critical mass?

A)

This refers to the mass of the critical elements in a reactor, i.e., the uranium or plutonium.
B)

This refers to the minimum amount of fissionable material required to sustain a chain reaction.
C)

This refers to the maximum amount of fissionable material required to sustain a chain reaction.
D)

This is the amount of mass needed to make a power reactor economically feasible.
E)

This is the material which is just on the verge of becoming radioactive.