## 7th Edition 1A.3

$c=\lambda v$

305144105
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### 7th Edition 1A.3

1.3 Which of the following happens when the frequency
of electromagnetic radiation decreases? Explain your reasoning.
(a) The speed of the radiation decreases.
(b) The wavelength of the radiation decreases.
(c) The extent of the change in the electrical field at a given point decreases.
(d) The energy of the radiation increases.

Posts: 62
Joined: Fri Sep 28, 2018 12:15 am

### Re: 7th Edition 1A.3

For b, wavelength and frequency are inversely related so they cannot both decrease at the same time due to c=lambda*nu

Reva Kakaria 1J
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### Re: 7th Edition 1A.3

The answer is C, the extent of the change in the electrical field at a given point decreases, because since E =hv, when frequency decreases, so does energy. Less energy means less of a change in the electrical field. Hope this helps!

Nicolette_Canlian_2L
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### Re: 7th Edition 1A.3

what is the relationship between energy and frequency?

Gillian Ward 1F
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

### Re: 7th Edition 1A.3

Energy and frequency and directly proportional, because when the frequency increases so does the energy.