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Vertical metal fence - PowerPoint PPT Presentation

Wavelength & Frequency

If you are making a mirror for a big telescope (that uses visible light), how smooth should the glass be? In other words, irregularities in the glass should be no larger than (approximately!): a) 1 mm (10 -3 m) b) 1 nm (10 -9 m) c) 1 fm (10 -15 m) d) there can be no irregularities at all.

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Vertical metal fence - PowerPoint PPT Presentation

Wavelength &amp; Frequency

Wavelength & Frequency