Light, Reflection and Refraction Check
1. What is a photon?
2. What is the wavelength of the radio wave for 95.5 XXX? The frequency for this radio station is 95.5 MHz (i.e. f = 95,000,000 Hz).
3. What is the acronym used to remember the colors of the spectrum? ______
4. Which color of the visible spectrum has the greatest energy? ______
5. List a color of the visible spectrum that has a longer wavelength than the color green. ______
6. Consider these three regions of the electromagnetic spectrum:
visibleinfrared (IR) ultraviolet (UV)
A. Which of these is most responsible for our sunburns?______
B. Which of these do we feel as heat?______
C. Which of these is produced in the greatest quantity by the Sun?______
7. What is the speed of light in diamond?
8. You have traveled to the Crystal Planet. This is a planet made entirely out of the purest glass and is 4500 km in diameter. How long will it take for your laser light beam to travel from you through the center of the planet to the surface on the far side?
9. The speed of light will be the smallest in ______.
A. air B. diamond C. glass D. vacuum E. water
10. Where would the actual fish be in the diagram below, A, B or C?
11. The law of reflection says that the angle of incidence ______
______
12. If you stand 3 feet away from a full length mirror, how far behind the mirror does your image appear to stand? ______
13. What is the difference between reflection and refraction?
15. The diagrams below show incident rays of light passing into and out of diamond. For each diagram, draw both a refracted ray and a reflected ray. The angle of reflection must be accurate. The angle of refraction does not have to be accurate.
Ray Diagrams. Draw diagrams showing rays of light as they reflect and refract to produce the images described below. Draw lenses or mirrors with appropriate shapes and positions. Reflections and refractions must obey the laws of physics. You must show: 1) all of the rays (actual in black and virtual dotted), 2) the position of the observer’s eyeball, 3) the observed image, and 4) the actual object
16. A person looks through a lens at an object. The image that he sees appears right-side up, but it is larger than actual size.
17. A person looks through a lens at an object. The image is upside-down.
18. A person looks through a lens at an object. She sees an image that appears smaller than actual size.
19.A person looks at herself in a single mirror and sees an image that is upside-down.
20.A person looks at himself in a single mirror and sees an image that appears larger than actual size. The image is right-side up.
21.A person looks at himself in a single mirror and sees an image that is upside-down.