A laser beam of wavelength 633 nm is expanded to a diameter of 0.75 metres using a telescope, and aimed at the Moon at distance 384,000 km. Calculate the diffraction diameter of the laser spot on the Moon. (You may ignore effects of the Earth's atmosphere).

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A laser beam of wavelength 633 nm is expanded to a diameter of 0.75 metres using a telescope,
and aimed at the Moon at distance 384,000 km. Calculate the diffraction diameter of the laser
spot on the Moon. (You may ignore effects of the Earth's atmosphere).
Transcribed Image Text:A laser beam of wavelength 633 nm is expanded to a diameter of 0.75 metres using a telescope, and aimed at the Moon at distance 384,000 km. Calculate the diffraction diameter of the laser spot on the Moon. (You may ignore effects of the Earth's atmosphere).
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