Question

A metal foil has a threshold frequency of 5.45 x 10^14 Hz. Which color of visible light will not eject electrons from this metal?

a) blue
b) indigo
c) violet
d) orange

c=(wavelength)(v)

3.0x10^8m/s = (wavelength)(5.45 x 10^14 Hz)

550 nm -> releases green. So, I am guessing the answer would be d) orange.
I agree
this wrong. the answer is Green, Blue, Indigo and violet
^nope, the tutor was in fact correct. blue, green, violet, and indigo ARE ejected. Orange, is not ejected. Read the question carefully, "which will NOT eject electrons."

Related Questions

When light of a wavelength of 125 nm strikes a certain metal, electrons having a velocity of 8.2 x 1... Find velocity of electron emitted by metal whose threshold frequency is 2.1*10^14 and when exposed t... The minimum frequency of light needed to eject electrons from a metal is called the threshold freque... A metal foil has a threshold frequency of 5.45× 1014 Hz. Which of the colors of visible light have e...