Q.7. a filter passer light with λ=500 nm if the emerging wavelength of 20 λo what is the frequency bandwidth of the exiting light?

Problem 19:  Sodium vapor light (average wavelength 598 nm) falls on a single slit of width 7.75 μm.Randomized Variablesλ = 598 nmw = 7.75 μm     At what angle θ, in degrees, does it produces its second minimum?Numeric   : A numeric value is expected and not an expression.θ = __________________________________________

Q3. Amicrowave transmitter is used to direct microwaves of wavelength 30 mm along a line XY. A metal plate is positioned at right angles to XY with its mid-point on the line, as shown. A B C X D transmitter When a detector is moved gradually along XY, its reading alternates between maxima and minima. Which one of the following statements is not correct? The distance between two minima could be 15 mm. The distance between two maxima could be 30 mm. The distance between a minimum and a maximum could be 30 mm. The distance between a minimum and a maximum could be 37.5 mm. detector metal plate Y

A thin film of polystyrene n=1.49 coats a piece of glass n=1.55. When illuminated from above, the dominant color of the light reflected to the observer is 473 nanometers wich is blue. What is the minimum thickness of the thin film? A. 317 nm B. 153 nm C. 159 nm D. 305 nm E. 79.4 nm

At what angle will the microwave be completely polarized? explain   ASAP?