PHY 101 Week 4 Individual Assignment Textbook Exercises
PHY 101 Week 4 Individual Assignment Textbook Exercises Recent
Chapter 19: 7 & 31
7. What happens to the period of a wave when the frequency decreases?
31. Why is lightning seen before thunder is heard
13. When a sound wave moves past a point in air, are there changes in the density of air at this point? Explain
16. If a bell is ringing inside a bell jar, we can no longer hear it when the air is evacuated, but we can still see it. What differences in the properties of sound and light does this indicate
23. Would the refraction of sound be possible if the speed of sound were unaffected by wind, temperature, and other conditions? Defend your answer
Chapter 26: 47
When you look at the night sky, some stars are brighter than others. Can you correctly say that the brightest stars emit more light? Defend your answer.
Chapter 28: 4
Fermat’s principle is of least time rather than of least distance. Would least distance apply as well for reflection? For refraction? Why are your answers different?
Chapter 28: 9
When you look at yourself in the mirror and wave your right hand, your beautiful image waves the left hand. Then why don’t the feet of your image wiggle when you shake your head?
Chapter 28: 26
During a lunar eclipse, the Moon is not completely dark but is usually a deep red in color. Explain this in terms of the refraction of all the sunsets and sunrises around the world.
Chapter 29: 2
In our everyday environment, diffraction is much more evident for sound waves than for light waves. Why is this so?
Chapter 29: 22
When dishes are not properly rinsed after washing, different colors are reflected from their surfaces. Explain.
Chapter 29: 28
Polarized light is a part of nature, but polarized sound is not. Why?