Non-reflective coating is put on eyeglasses. Magnesium fluoride MgF2 is used. The refractive index of MgF2 is 1.38. Designed for light of wavelength 584 nm, the thinnest coating thickness needed is nm. Type your answer....
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- Calculate the numerical aperture of an optical fibre whose core and cladding are made of materials of refractive index 1.6 and 1.5 respectively. Select one: a. 0.2458 b. 55.77 c. 0.55677 d. 0.647852Jackson is standing in air and is shining a flashlight at a 62-cm-thick slab of glass. His beam makes an angle of 83.5 degrees with the surface of the glass. The glass is a dispersive medium, and has an index of refraction of 2.1 for red light and 2.3 for purple light. Find the distance between the point where the red light leaves the slab and where the purple light leaves it. [The angles of refraction are small, so make the appropriate approximation when calculating their sines.]A laser beam with a total power of 22 watts is incident at a normal angle of incidence on a Lambertian surface. How much power reaches a detector with an area of 0.1 cm2 at an angle of 25 degrees located at a distance of 40 cm from where the beam strikes the surface? Please check closest answer. 0.525 mW 0.397 mW 0.247 mW 0.421 mW
- Please asapPart (b) Numerically, what is the angle in degrees? θ2= Part (c) Write an expression for the reflection angle ψ, with respect to the surface. ψ = Part (d) Numerically, what is this angle in degrees? ψ =Q1: If the refractive indexes of the mica plate in the direction of the slow axis and the fast axis are as follows: n =1.5977, n1= 1.5936, Find the thickness of this plate needed to make the optical path difference between the two rays passing through the plate equal to a quarter of the wavelength if light of its wavelength was passed through A = 5890 nm.