Optics Answers

Why observable interference fringe pattern cannot be obtained by using two incoherent
sources in an interference experiment? Justify your answer.

A convex mirror in an amusement park has a radius of curvature of 3.00 m. A man stands in front of the mirror so that his image is half as tall as his actual height. At what distance must the man focus his eyes in order to see his image?

Differentiate between constructive and destructive interference. Use mathematical expressions.

Suppose you pass light from a He_Ne lesser through two slits separated by a 0.01mm and you find that the third bright line on a screen is formed at an angle of 10.95 degrees relative to the incident beam. What is the wavelength of the light? What is the highest order constructive interference possible with this system?

If you walk toward a plane mirror at 1.5 m/s, with that velocity will your image approach you? If instead you remain at rest and it is the mirror being moved away from you at 1.5 m/s, with what velocity your image move away from you?

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A concave mirror has a focal length of 0.25 m. If an object produces a virtual image 0.04 m from the mirror, where is it located?

Joe is told by his ophthalmologist that he requires glasses with a refractive power of −4.7 D to correct his vision. His previous prescription was −3.8 D.(a) Is Joe nearsighted or farsighted? (b) When Joe is not wearing his glasses, how far away can he see objects clearly? (c) When he wears his old prescription, how far away can he see clearly?

A beam of light from a laser hits a grid with the grid constant of 1.67 microns. Behind the grid, 5 rays can be observed. The angle between the outermost rays was measured to 94.1 degrees. Calculate the wavelength of the laser light.