We think you are located in South Africa. Is this correct?

# Do you need more Practice?

## End of chapter exercise

Exercise 11.4

What is the energy of a photon of EM radiation with a frequency of $$\text{3} \times \text{10}^{\text{8}}$$ $$\text{Hz}$$?

Solution not yet available

What is the energy of a photon of light with a wavelength of $$\text{660}$$ $$\text{nm}$$?

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What is the energy of a photon of light with a frequency of $$\text{13}$$ $$\text{THz}$$?

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What is the wavelength of a photon of light with a frequency of $$\text{101,3}$$ $$\text{kHz}$$?

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What is the energy of a photon of light with a wavelength of $$\text{532}$$ $$\text{nm}$$ and one with a frequency of $$\text{13}$$ $$\text{GHz}$$ and which has the longer wavelength?

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List the main types of electromagnetic radiation in order of increasing wavelength.

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List the main uses of:

2. infrared

3. gamma rays

4. X-rays

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Explain why we need to protect ourselves from ultraviolet radiation from the Sun.

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What precautions should we take when using cell phones?

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Explain why some types of electromagnetic radiation are more penetrating than others.

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