What is destructive interference of two waves of electromagnetic radiation?

A) the two waves have very jagged edges and nothing can be seen;

B) two waves are out of phase and exactly cancel - no net motion;

C) the colors of the two waves cancel making black;

D) the speeds of the waves are opposite





A star is five times hotter than the Sun (its T is five times greater). How much more radiation will it emit per square meter per second (remember F = 氓T4) ?



A) 25;

B) 625;

C) 5;

D) 125



Thanks!What is destructive interference of two waves of electromagnetic radiation?
For any wave ( including electromagnetic waves) answer B is correct.

Waves out of phase cancel leaving no net amplitude.



I do not know the answer to the second part but if you meant to say F = 氓T^4

( which is what I think you meant) then 5 ^ 4 = 625 and it would emit 625 times the radiation per unit.

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