Question

1. An important reason for using a very large diameter objective in an astronomical telescope is
   1. to decrease the magnification.
   2. to increase the resolution.
   3. to form a virtual image, which is easier to look at.
   4. to increase the width of the field of view.
   5. to increase the depth of the field of view

1. For two beams of light traveling different distances in reaching a point, and to form maximum constructive interference at that point, the beams must travel paths that differ
   1. By half a wavelength
   2. One wavelength
   3. The frequency divided by 2.
   4. The frequency

Answer 1