Diffraction spreading for a flashlight is insignificant compared with other limitations in its optics, such as...
Diffraction spreading for a flashlight is insignificant compared with other limitations in its optics, such as spherical aberrations in its mirror. To show this, calculate the minimum angular spreading of a flashlight beam that is originally 5.15 cm in diameter with an average wavelength of 600 nm.
?=rad
Homework Answers
according to the Rayleigh Criterion the minimum angular spreading, for a circular aperture, is
then,
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Diffraction spreading for a flashlight is insignificant compared
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(a) What is the minimum angular spread (in rad) of a 694 nm wavelength ruby laser...
(a)
What is the minimum angular spread (in rad) of a 694 nm
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________ rad
(b)
If this laser is aimed at a mountain cliff 15.5 km away, how big
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(c)
How big a spot would be illuminated on the Moon, neglecting
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to...
(a)
What is the minimum angular spread (in rad) of a 694 nm
wavelength ruby laser beam that is originally 1.17 mm in
diameter?
________ rad
(b)
If this laser is aimed at a mountain cliff 15.5 km away, how big
will the illuminated spot be? (Give the diameter of the spot in
meters.)
_________ m
(c)
How big a spot would be illuminated on the Moon, neglecting
atmospheric effects? (This might be done to hit a corner reflector
to...
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