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MMLU-Pro / 9151 / A helium-cadmium laser emits a beam of light 2 mm in diameter and containing the…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A helium-cadmium laser emits a beam of light 2 mm in diameter and containing the wavelengths 325 and 488 nm, respectively. At what distance from the laser, assuming diffraction-limited performance and propagation through free space, would these two components be separated by 1 cm?

category

physics

options

  1. 100 m
  2. 50 m
  3. 120 m
  4. 150 m
  5. 40 m
  6. 250 m
  7. 200 m
  8. 300 m
  9. 75 m
  10. 500 m

src

stemez-Optics

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Official source

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