Question

D?

Answer 1

not quite, take a quick look at this spectrum, notice how its arranged from high to low frequency

Answer 2

high being the purplr right

Answer 3

well, yeah but the rainbow spectrum part is only part of the visible light spectrum, there's one type that's even higher in frequency

Answer 4

B

Answer 5

perfect

Answer 6

C

Answer 7

note: radio waves are lower in energy than microwaves (check the EM spectrum)

Answer 8

right, i need to refer back to that

Answer 9

hm. well I can eliminate light sensor (this detects light, it doesn't produce an image) and gamma knife (this is used to remove unwanted tumors/cells/etc.)

would have to do a bit of quick research to see airport scanner vs night vision goggles

Answer 10

A

Answer 11

gamma rays are too dangerous for commercial use

toy cars/planes/etc. use radio waves