# Atmospheric ozone plays a protective role by absorbing high‑energy, damaging UV radiation, including UV‑A (320–400 nm) , UV‑B (280–320 nm), and UV‑C (200–280 nm). Unfortunately, human‑caused pollution has eroded the ozone layer in the stratosphere, allowing a greater amount of ultraviolet radiation to reach the Earth's surface. The damaging effects of the radiation are related to its photon energy.Arrange the regions of UV radiation from lowest to highest photon energy.UV‑BUV‑CUV‑ALowest photon energy: ______________Middle photon energy: _______________Highest photon energy: ______________ Which region of the UV spectrum has the greatest frequency?1. UV‑C2. All three regions have the same frequency.3. UV‑A4. UV‑B

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Atmospheric ozone plays a protective role by absorbing high‑energy, damaging UV radiation, including UV‑A (320–400 nm) , UV‑B (280–320 nm), and UV‑C (200–280 nm). Unfortunately, human‑caused pollution has eroded the ozone layer in the stratosphere, allowing a greater amount of ultraviolet radiation to reach the Earth's surface. The damaging effects of the radiation are related to its photon energy.

Arrange the regions of UV radiation from lowest to highest photon energy.

UV‑B

UV‑C

UV‑A

Lowest photon energy: ______________

Middle photon energy: _______________

Highest photon energy: ______________

Which region of the UV spectrum has the greatest frequency?

1. UV‑C

2. All three regions have the same frequency.

3. UV‑A

4. UV‑B

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Step 1

The energy of a photon of a radiation is expressed as:

Step 2

Given,

Wavelength range of UV‑A = 320–400 nm

Wavelength range of UV‑B = 280–320 nm

Wavelength range of UV‑C = 200–280 nm

Let us calculate the mean wavelength value for every radiation as:

Step 3

The energy of one photon of UV‑A ...

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