please show work and reasoning 8) Light from a helium-neon laser beam, with wave
ID: 1273153 • Letter: P
Question
please show work and reasoning
8) Light from a helium-neon laser beam, with wavelength ? = 632.8 nm is incident
on a single slit of width d = 0.3 mm, as shown in Fig.-5 below. The viewing
screen is 2 m away from the slit. Calculate the angular positions of the first bright
maxima, analogous to those shown in Fig.-5.
10) The ongoing Lunar Laser Ranging Experiment has for 45+ years, precisely
measured the distance between the Earth and the Moon. Apollo 11 astronauts
Neil Armstrong and Buzz Aldrin enabled these experiments by installing precision
retroreflectors during their successful moonwalks on July 20-21, 1969 (Buzz
Aldrin, shown in Fig.-6). Yes, they were there!
Astronaut Buzz Aldrin is 5' 10" (1.78 m) tall. Fellow astronaut Neil Armstrong,
who took the image of Aldrin, was 5' 9" (1.753 m) tall. Assume that the face
shield on Aldrin
Explanation / Answer
(a)
E=hf where h is Planck's constant and f is frequency. f=c/? (where c is the speed of light and ? is the photon's wavelength) so E=hc/?.
Planck's constant (h) = 6.626
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