Which of the following can be explained only by the wave nature of electromagnetic radiation?
a. atomic line spectra
b. electron diffraction
c. photoelectric effect
d. x-ray diffarction

If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer

Freya has a mass of 14kg she is running at 1.1m/s to the left when she runs into eric, who is standing still. eric has a mass of 18kg. after the collision, they continue moving together. what is their velocity after the collision. a. 0.48 m/s to the leftb. 2.5 m/s to the leftc. 0.86 m/s to the leftd. 1.4 m/s to the left

The theory that light exists in quantized "chunks" was proposed in response to which of the following? a. electron interference patterns o b. discovery of planck's constant o c. the ultraviolet catastrophe o d. emission spectra