Question

What is the frequency of light with a wavelength of 18 cm? What part of the spectrum is this?​

Answer 1

First, find the frequency,

$\sfλ= \frac{c}{f}$

can be rearranged to give

$\sf \: f \: = \frac{c}{ λ}$

$\sf{f = \frac{3 \times 10 {}^{8}m \s }{0.18m} }$

$\sf \: f = 1.7 \times 10 {}^{9} Hz$

From the given figure, we can see that this is in the radio part of the spectrum. If we want to observe at this wavelength, we must use a radio telescope.

Answer 2

Answer:

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