Questions from Light chapter
1) Explain why, unlike matter, we can only study light indirectly.
2) “Light cannot be directly observed” – give your thoughts and ideas on what this means.
3) What does it mean for something to be difficult to “pin down”?
4) What is a “baffling dilemma”?
5) Explain this sentence, “Evidence for accepting a wave or particle model seems to depend on which experiments are considered.”
6) What is refraction?
7) List the three models used to describe the behavior of light and explain when each model is applicabable.
8) Explain this sentence “The acceleration produces a wave consisting of electrical and magnetic fields that become isolated from the accelerated charge, moving off into space.”
9) The greater the acceleration of a charge, the ____ (higher or lower) the wavelength of the emitted light?
10) What does it mean for visible light to occupy the “middle portion” of the electromagnetic wave spectrum?
11) What is an “idealized” material?
12) What determines how much energy is available to accelerate charged particles?
13) What does it mean for all electromagnetic waves to have the “same fundamental character”?
14) Explain this sentence, “A graph of the frequencies emitted from the range of available energy is thus somewhat bell-shaped.”
15) Which is brighter, a very hot object or a medium-hot object? Use Figure 4 to explain.
16) Explain why, based on your knowledge of movement of molecules in a “hot” object, hotter objects emit higher frequency radiation.
17) Estimate the frequency of peak radiation for objects at 6,000 K.
18) Which would be brighter (i.e. have higher intensity) – an burning object that looks blue or a burning object that looks yellow?
19) Why can burning objects appear to be red, but not appear to be violet?
20) If burning objects can’t emit light, then why does hydrogen emit violet light?
21) Which is broader relative to its height, the radiation spectrum for 6,000 K objects or for 4,000 K objects?
22) Given that light from the sun takes 8 minutes to travel to the surface of the earth, calculate the distance between the sun and the earth’s surfaces.
23) What does it mean to say “there are limits to using a light ray for explaining some properties of light”?
24) At an atomic and molecular level, what do you think a perfectly smooth surface is?
25) List the three ways in which light interacts with matter.
26) Explain this sentence “Any combination of these interactions (reflection, absorption, transmission) can take place but a particular substance is usually characterized by what it mostly does to light.”
27) Explain “Absorbed light gives up its energy to the material and may be reemitted at a different wavelength or it may simply show up as a temperature increase.”
28) If absorbed light gives its energy to a material and is then reemitted at a different wavelength, would the wavelength of the reemitted light be larger or smaller than the original light? (HINT: think about energy of light waves and the amount of energy carried by long and short wavelength light)
29) “Vertical rays of light… are mostly transmitted through a transparent material with some reflection and some absorption.” Draw a diagram to show what this might look like (include the vertical rays and the transparent material – be sure to draw the path of the rays)
30) Explain why there is a “glare” of sunlight around a body of water.
In the 15th question, its given that use figure 4 to explain. But there is nothing such as figure 4. it starts from figure 7.1
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PS: aman's net not working properly. So wrote his name too :)