Angle Eyepiece
May 2nd, 2011
Physics: Need help with some problems?
I need help with these questions. Please do not just give the answers, but explains how step by step. 1.Red light (n = 1520) and violet (n = 1,538) incident are traveling by air from a slab of crown glass. Both colors enter in the same glass angle of refraction. The red light has an angle of 30 degrees. What is the angle of incidence of light purple? These values are not given in the problem, but the index of refraction of air is n = 1, and the index of refraction of crown glass is n = 1.523. 2.Mars subtends an angle of 8.0 X 10 ^ -5 radians (8 sometimes 10 to less than 5 rad) at a glance. An astronomical telescope has an eyepiece with a focal length of 0,032 meters. When Mars is using this telescope, covering an angle of 2.8 X 10 ^ -3 radians (2.8 times 10 to less than 3 radians). Find the focal length telescope objective lens.
(1) the Snell's law sin (Angle of incidence) / sin (angle of refraction) = n1 / n2 They give the n2 is for red and violet. Use n1 = 1 for air. Use Snell's law to calculate the angle of refraction of red light given the angle of incidence. You also say that the angle of refraction of light purple. Use that to calculate the angle incidence of light purple.
Meade Series 5000 Super Wide Angle 40mm Eyepiece
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