Answer to Question #280635 in General Chemistry for Crash

Question

Ultraviolet light with a wavelength longer than about 295 nm has little germicidal value. What is the frequency (in Hz) that corresponds to this wavelength?

Answer 1

Let's use the equation below to determine the answer.

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• The speed of light has a value of approximately 3.00
• ×
• 10
• 8
• m
  
• s
• The wavelength should have units of meters.
• The frequency should have units of H
• z
• or
• s
• −
• 1
• . Hz is hertz or reciprocal seconds.

We know the value of the speed of light and we are given the wavelength. All we have to do is rearrange the equation to solve for the frequency:

v

=

c

λ

Now just plug in the given values:

v

=

3.00

×

10

8

m

s

530

×

10

−

9

m

v

=

5.66

×

10

14

H