Which of the following is closest to the frequency of the light with photon energy of 3. 3×10−19j?.

The answer is number 4.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.

Establish a study routine & set up a distraction-free study environment! (All answers apply but Sofia should focus on those two.)