Question

why do coated lenses appear violet in colour? Interference fringes are produced by monochromatic light falling normally on A a wedge shaped film of cellophane whose RI is 14. The angle of wedge is 20 seconds of an are and the distance between successive bright fringes is 0.25 mm Calculate the wavelength of light​

Answer 1

Answer:

Interference fringes are produced by monochromatic light falling normally on A a wedge shaped film of cellophane whose RI is 14. The angle of wedge is 20 seconds of an are and the distance between successive bright fringes is 0.25 mm