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48 Multiple choice questions

  1. all travel at 3x10^8 m/s
  2. reflect light, everything we see that isn't luminous
  3. light rays will bounce off a surface at the same angle they struck
  4. allow light to pass through but the light is distorted, example: frosted glass
  5. heat which occurs in a regular incandescent bulb, electricity through a gas which occurs in a fluorescent light bulb, and light shining on a substance that glows which occurs in the white phosphorous in the inside of the fluorescent tubes
  6. do not allow light to pass through, example: solid wall
  7. give off their own light, example: sun, light bulb, candle flame
  8. all the colors of white light when viewed through a spectroscope, ROYGBIV
  9. the lens can focus near but not far, most young people who need glasses are nearsighted, corrected with a diverging lens
  10. the color we see due to the wavelengths reflected. Blue objects reflect blue wavelengths and red objects reflect red wavelengths, etc. Black objects absorb light and white objects reflect all wavelengths
  11. low frequency and harmless
  12. thicker in the middle and thinner on the ends, example: magnifying glass
  13. they contain a concave or spherical mirror or parabolic mirror, the light source is placed at the focal point and the light shines back on the mirror and reflects as a beam
  14. high frequency and harmful
  15. brightness of the source, measured in candles or candle power
  16. blue wavelengths reflect off air molecules and scatter in all directions
  17. when mixed they produce white: blue, green, and red
  18. reflection off a rough surface, no image is seen
  19. as light pases from less dense medium into more dense medium, it will blend towards to the normal. If the light ray passes from more dense to less dense, it bends away from the normal
  20. the lens canot focus near, almost all people become this as they age and need reading glasses, converted with a converging lens
  21. allow light to pass through without distortion, example: clear glass or air
  22. numerical value for the optical density of the substance
  23. the amount of light that falls on a surface, depends upon the brightness of the source and how far the surface is from the source
  24. focal length is negative
  25. (microscope or telescope) contains at least 2 lenses, the real image is produced by the first lens (objective lens) becomes the object for the second lens (the eyepiece) that magnifies it as a larger virtual image
  26. when a light passes from more dense medium toward less dense medium, if the angle is large enough, it wil not refract out of the substance but rather reflects inward
  27. produced when tiny water droplets in the sky act as prisms and disperse the light
  28. distinct lines of color (wavelength) given off an element when viewed through a microscope
  29. brightness of the source, more commonly used than luminous intensity, measured in lumens
  30. as light passes from one medium to another, it changes velocity. If the light enters the new medium at an angle, the light ray will bend. The degree to which it bends upon the optical densities of the media involved
  31. small portion of the electromagnetic spectrum that our eyes are capable of seeing
  32. contains a flexible converging lens surrounded by muscles, the muscles contract to focus near and relax to focus far, a real image is focused on the black of the eye (retina)
  33. cannot be projected and is only seen on the mirror or lens, they are always right side up. Image distance is negative, magnification and height are positive
  34. breaking of white light into its colors when it passes through a prism, it produces a continuous spectrum (ROYGBIV)
  35. reflection off a smooth surface like mirrors, images are seen
  36. light left sun 8 minutes ago, the light is going to the atmosphere, different in n's and the light bends. The light bends from vacuum to air, the n changes
  37. when light strikes a thin foil, electrons are emmitted off the backside of the foil as if a collision took place, this effect could not be explained by the wave theory and was a conclusive support for the particle theory
  38. curved inward
  39. light has the properties of both particles and waves
  40. complete range of radiation produced by accelerated charged particles
  41. can be projected onto a screen and is always upside down if the object is right side up. Image distance is positive, magnification and height are negative
  42. all atoms have electrons in distinct energy levels. When atoms absorb energy, electrons move to higher energy levels. In all substances, the electrons return to lower energy levels and give off energy in form of light
  43. yellow, cyan, magenta
  44. thinner in the middle and thicker on the ends
  45. change in density above road is caused by heat, causes the light to bend and never reach the road
  46. angle of incidence = angle of reflection
  47. distance that light travels in one year, used to measure extremely large distances like the distance to stars
  48. 1m/m^2