Question

An astronomer using a fluorite refractor lens (n=1.434) wishes to observe the hydrogen alpha emissions from a nebula. These emissions have a wavelength of 656. 3m. To maximize transmission of the light through the lens aspecial optical coating having an index of retraction of 1.355 is put on the front surface of the lens. What minimum thickness of such a coating would maximize the transmission of the light in other words, it minimizes reflection)? 8) Two plane mirrors are arranged as shown below. A beam of light strikes the first one at an angle of 20" with respect to the horizontal. At what angle with respect to the horizontal does it leave the second mirror?

Answer 1

For reflection incident angle = reflected angle

90-55:35: i 180-105-20 70 70 - 180.75=105 Angie (0) = 3.5'+ 35' - 2012 Anglecol = 5oT with Horizent al