Question

Also visible light with a wavelength of 480nm appears

A violet
B green
C blue
D red

Microwave have a _____ wavelength and _____ Frequency than radio wave

A longer,higher
B longer,lower
C shorter, higher
D shorter, lower

Please need help

Answer 1

480nm appears blue
Microwave have a shorter wavelength and higher Frequency than radio wave

Answer 2

a) The correct answer is

C blue

In fact, we see from the electromagnetic spectrum in the figure that light with wavelength of 480 nm corresponds to blue light.

b) The correct answer is

C shorter, higher

In fact, microwaves have wavelengths between 0.1 cm and 1.0 m, while radio waves can have wavelength of several metres, so microwaves have shorter wavelength than radio waves. Since the frequency of a wave is inversely proportional to its wavelength, this also means that microwaves have higher frequency than radio waves.