Physics Review Question

Unit: Optics
Year: 1996 Question#: 91
Question: Which phenomenon allows a lens to focus light?

(1 ) diffraction
(2 ) refraction
(3 ) interference
(4 ) polarization

What is this question really asking?

Explanation by: LJG
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Answer 1
1. diffraction

Diffraction can separate light by wavelength, creating a spectrum.
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Answer 2 refraction


Refraction bends light. A curved glass surface can bend this light to form an image.
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Answer 3
3. interference


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Answer 4
4. polarization


Polarization eliminates one orientation of light, and has nothing to do with the focusing the light. return to top

What's this question really asking?

The question is asking which type of lens can focus light. return to top

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