Diffuse reflection occurs when the size of surface irregularities is

6. Light and television or radio waves are all electromagnetic waves and travel with the same speed. Television often uses communications satellites that orbit about 35,000 km above Earth's surface. How can this explain the lag sometimes seen as a TV interviewer talks with someone at a remote location?

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A mirage is a result of atmospheric

19. In the interference pattern produced by shining a laser through two slits (Young's double slit experiment), the bright areas are the result of

3. After Thomas Young's famous double-slit experiment, people regarded light as a wave. What made Young's ideas about light different -- and more compelling -- than Huygens' ideas?

Your imageina plane mirror is

15. Make a sketch of how you could arrange two prisms to make a periscope that would allow you to see over taller people in a crowd or to see around a corner. It may help to start with a sketch using mirrors and then replace the mirrors with prisms.

Rainbows are not usually seen as complete circles because

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These four categories are as follows: point and shoot, mirrorless (sometimes referred to as 4/3s), crop frame DSLR, and full frame DSLR.

15. The critical angle for a transparent material is the angle at and beyond which all light within the material is totally

16. As light is reflected and bounces around a single fiber optic, it becomes all jumbled up. A single fiber optic--or "light pipe"--will not produce a clear image. How, then, can a clear image be seen?

Refractioncauses the bottom of a swimming pool to appear

9. If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the

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when alightbeam emergesfromwater into air, the averagelightspeed

19. In the interference pattern produced by shining a laser through two slits (Young's double slit experiment), the bright areas are the result of

22. Consider the arrangement of polarizer and analyzer shown in Figure 16.24. Cross the polarizer and analyzer 90o so that no light passes the analyzer. Now insert a third Polaroid sheet between the two. Describe what happens&emdashhow much light passes through the entire system&emdashas the third and inner Polaroid sheet is rotated a full 360o.

2. Light and television or radio waves are all electromagnetic waves and travel with the same speed. Television often uses communications satellites that orbit about 40,000 km above Earth's surface. How long does it take a TV signal to travel from a transmitter to the communications satellite and back down to a receiver?

1. 1. You can often see some of the details in the dark portion of a crescent moon. Where does the light come from that allows you to see this?

Refractionoccurs whenlightpassingfromone medium to another

17. If you hold onto the end of a rope and wiggle it up and down you produce a continuous wave that is polarized vertically. You can continue to do this until your arm gets tired. Yet the light from a flashlight is not polarized. Why not?

15. The critical angle for a transparent material is the angle at and beyond which all light within the material is totally

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Coherence length is the space over which a wave is 'nicely' sinusoidal. In other words, it is the space over which we can predict the phase of a wave of beam.

When the third and inner polarizer is rotated 0o and 90o, no light passes through. But, between those two extremes, light does pass through!

9. If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the

Magnification by a lens would be greater iflight

We can see that in rotating the third and inner polarizer through 90o, the light goes from no light to some maximum and back to no light that is passed through. This will be the case for each 90o that we rotate this third and inner polarizer.

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18. Consider the polarizer and analyzer sketched in Figure 16.24. Describe the intensity of the light passing through the analyzer as the analyzer is rotated a full 360°.

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