Question 1

Which part of the spectrum is used in night vision devices?
Infrared

Question 2

Which electromagnetic wave has the shortest wavelength?
Gamma rays

Question 3

What is the primary function of the ionosphere in radio communication?
Reflecting radio waves

Question 4

Which law states that the total energy radiated by a blackbody is proportional to T⁴?
Stefan-Boltzmann law

Question 5

What is the frequency of a 600 nm light wave?
5 × 10^14 Hz