Optics

If the object is far enough away from the lens, you can assume the focal length is just the image distance. True False

13. What is meant by diffraction? Compare and contrast diffraction and interference. What is meant by a diffraction pattern? Describe the diffraction pattern for light passing through a thin slit. What about through a double slit? Describe in detail, both qualitatively(with appropriate diagrams) and quantitatively (list relevant equations) the following:double-slit interference, single-slit diffraction, double-slit diffraction. Do the same for the diffraction pattern for light passing through a circular opening. What implications does this have for the resolution of an optical instrument? What is Rayleigh's criterion?

15. What is the role of Hugyen's Principle in the theory of diffraction? Whatoptical path length? What role does this play in diffraction theory? What is an ordermeant by annumber? What is constructive interference? What is destructive interference? What ismeant by the Fraunhofer approximation in diffraction theory?

8. Explain what is meant by the linear magnification of a lens or mirror. Describe what is meant by chromatic aberration and spherical aberration. How, in practice, does one mitigate these problems?

. (1) In the Young's experiment, if the two slit aperture plate is replaced by three slit apertureplate, calculate the interference fringe pattern. (assume the same separation of the slits). Draw the schematics of the fringe pattern.

A movie camera with a (single) lens of focal length 75mm takes a picture of a person standing 27 m away. If the person is 180 cm tall, what is the height of the image on the film?

Two positive charges, q, = +12nC and q, = +15nc, are separated by a distance of 2 m. Locate the position between them where the net electric field is equal to zero.

A collimated Gaussian beam has a spot size of 1 mm and wavelength of 0.8um. Compute the focused spot size when focused by a lens whose focal length is 20 mm.

a) Two plane mirrors meet at and angle of 135°. If a light ray strikes one mirror at an angle of 35°, at what angle O does it leave the other mirror? b) A person whose eyes are 1.7 m above the ground stands 2.3 m in front of a vertical plane mirror whose bottom edge is 0.38 m above the floor. What is the horizontal distance x from the base of the wall that is supporting the mirror of the nearest point on the floor that can be seen reflected in the mirror? Hint: It may help to draw a picture for this situation.

1-3. Two 1-km fibers are spliced together.Each fiber has a 5-dB loss and the spliceadds 1 dB of loss. If the power enteringis 2 mW, then how much power is deliv-ered to the end of this combined trans-mission line?