Last year was the International Year of Light!
And, yes, we missed it!
2. Scientifically, light exhibits _______________
a. wave-like behavior only
b. particle-like behavior only
c. both particle and wave like behavior
d. neither particle nor wave like behavior
3. Which of the following statements about light is/are true? (Could be more or less than one)
a. light has no rest mass
b. the visible light we see comprises only a small part of the electromagnetic spectrum
c. all photons of light have the same amount of energy
d. visible light is more energetic than ultra violet light
4. The word "LASER" is an acronym meaning what?
5. By light-time distance, how far away is the Sun?
a. one light year
b. one light astronomical unit
c. 8.3 light minutes
d. 1.3 light seconds
6. What can one say about a celestial body that has an albedo of 1?
a. It reflects all the light that strikes it
b. It reflects 1% of all the light that strikes it
c. It reflects 10% of all the light that strikes it
d. It reflects none of the light that strikes it
7. Going from low to high energy, what is the sequence of colors within the visible light spectrum?
a. blue green yellow red orange violet
b. red orange yellow green blue indigo violet
c. violet indigo blue green yellow orange red
d. orange red yellow green indigo violet
8. Betelgeuse is red; Rigel is blue. Which is the hotter of the two?
a. Betelgeuse
b. Rigel
c. They are equally hot
d. No enough information to determine.
9. Traveling at high speeds causes time to dilate. An astronaut travels on a vessel for what, to him, seems like one year. A person on Earth experiences two years. How fast was the astronaut moving?
a. 50% the speed of light
b. 75% the speed of light
c. 86% the speed of light
d. 99.9999% the speed of light
10. White light is__________
a. the absence of all colors
b. the combination of all colors
c. neither a nor b
d. both a and b
ANSWERS
1. d. 5.8 trillion miles
2. c. both particle and wave like behavior