Question

A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. The laser beam is sent through the telescope in opposite the normal direction and can then be projected onto a satellite or the Moon. If this is done with the Mount Wilson telescope, producing a 2.54 m diameter beam of 643 nm light, what is the minimum angular spread of the beam? minimum angular spread: 3.08 ×10?? rad Neglecting atmospheric effects, what is the size of the spot this beam would make on the Moon, assuming a lunar distance of 3.84 × 10? m? size of spot on the Moon: 121.13 m Question Credit: OpenStax College Physics

          A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. The laser beam is sent through the telescope in opposite the normal direction and can then be projected onto a satellite or the Moon. If this is done with the Mount Wilson telescope, producing a 2.54 m diameter beam of 643 nm light, what is the minimum angular spread of the beam?
minimum angular spread: 3.08 ×10?? rad
Neglecting atmospheric effects, what is the size of the spot this beam would make on the Moon, assuming a lunar distance of 3.84 × 10? m?
size of spot on the Moon: 121.13 m
Question Credit: OpenStax College Physics

$A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. The laser beam is sent through the telescope in opposite the normal direction and can then be projected onto a satellite or the Moon. If this is done with the Mount Wilson telescope, producing a 2.54 m diameter beam of 643 nm light, what is the minimum angular spread of the beam? minimum angular spread: 3.08 ×10?? rad Neglecting atmospheric effects, what is the size of the spot this beam would make on the Moon, assuming a lunar distance of 3.84 × 10? m? size of spot on the Moon: 121.13 m Question Credit: OpenStax College Physics$

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