Which form of UV light is least affected by ozone and the atmosphere, so it can mostly reach the surface?Group of answer choicesUVAUVBUVCUVD

Break Down the Problem

1. Identify the types of UV light mentioned: UVA, UVB, UVC, and UVD.
2. Determine the characteristics of each type regarding their interaction with ozone and the atmosphere.

Relevant Concepts

1. UVA: Long wavelength (320-400 nm), penetrates the atmosphere with minimal absorption.
2. UVB: Medium wavelength (280-320 nm), partially absorbed by the ozone layer.
3. UVC: Short wavelength (100-280 nm), fully absorbed by the ozone layer.
4. UVD: This term is less common; it's often used interchangeably or as a broad category including all UV radiation.

Analysis and Detail

1. UVA is the most penetrating form of UV light and is less affected by atmospheric conditions and ozone compared to UVB and UVC.
2. UVB has some absorption by ozone, which significantly reduces the amount reaching the Earth’s surface.
3. UVC is completely absorbed by ozone, rendering it ineffective at reaching the surface.
4. UVD designation can vary but tends to signify all UV radiation types, which does not provide clarity in this context.

Verify and Summarize

• Of all the UV radiation types, UVA is least affected by the ozone and the atmosphere, allowing it to reach the Earth's surface in significant amounts.

Final Answer

UVA is the form of UV light least affected by ozone and the atmosphere, allowing it to primarily reach the Earth's surface.