Question

1. place the following types of electromagnetic radiation in order of decreasing energy. ultraviolet light, radio waves, microwaves a. radio waves > microwaves > ultraviolet light b. ultraviolet light > microwaves > radio waves c. radio waves > ultraviolet light > microwaves d. ultraviolet light > radio waves > microwaves e. microwaves > radio waves > ultraviolet light

Explanation:

The energy of electromagnetic radiation is related to its frequency (or inversely to wavelength) by \( E = h
u \) (Planck's equation, \( h \) is Planck's constant, \(
u \) is frequency). The order of decreasing energy corresponds to decreasing frequency (or increasing wavelength) in the electromagnetic spectrum. The order of frequency (and thus energy) from highest to lowest among the given is: ultraviolet light > microwaves > radio waves (since ultraviolet has higher frequency than microwaves, which have higher frequency than radio waves).

Answer:

B. ultraviolet light > microwaves > radio waves