Author Question: Photons of visible wavelengths are shone on a surface starting with one end of the spectrum and ... (Read 44 times)

Redwolflake15 · **on:** Jul 29, 2018

Photons of visible wavelengths are shone on a surface starting with one end of the spectrum and gradually proceeding to the other end. When 589 nm is reached, electrons start coming out of the surface. Which of the following is true?

A)

The spectrum scan started at the blue end.
B)

Electrons would not be ejected at this wavelength for any material.
C)

The spectrum scan started at the red end.
D)

The spectrum scan could have started at either end.
E)

none of the above

Question 2

A source of light is at a temperature of 1000C. Its temperature is then increased to 2000C, Increasing the temperature causes the peak intensity wavelength to

A)

triple.
B)

halve.
C)

decrease but not quite halve.
D)

double.
E)

more than double.