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48 True/False questions

  1. Bright Line Spectradistinct lines of color (wavelength) given off an element when viewed through a microscope

          

  2. Real Imagecan 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

          

  3. Electromagnetic Spectrumcomplete range of radiation produced by accelerated charged particles

          

  4. Rainbow in the Skyproduced when tiny water droplets in the sky act as prisms and disperse the light

          

  5. Primary Pigmentswhen mixed they produce white: blue, green, and red

          

  6. Law of Reflectionas 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

          

  7. Illuminance Calulationthe amount of light that falls on a surface, depends upon the brightness of the source and how far the surface is from the source

          

  8. Cosmic, Gamma, Ultraviolet, and X rayslow frequency and harmless

          

  9. Converging (convex) lensthinner in the middle and thicker on the ends

          

  10. Nearsightedness (myopia)the lens can focus near but not far, most young people who need glasses are nearsighted, corrected with a diverging lens

          

  11. Light, Infrared, and Radio Wavesdistance that light travels in one year, used to measure extremely large distances like the distance to stars

          

  12. Illuminated Objectsgive off their own light, example: sun, light bulb, candle flame

          

  13. Primary Colorsyellow, cyan, magenta

          

  14. Illumincance (Illumination)1m/m^2

          

  15. Diffuse Reflectionreflection off a smooth surface like mirrors, images are seen

          

  16. Velocity of Lightall travel at 3x10^8 m/s

          

  17. Translucent Objectsallow light to pass through but the light is distorted, example: frosted glass

          

  18. 3 means of atoms becoming excitedbrightness of the source, measured in candles or candle power

          

  19. Refraction of Lightlight rays will bounce off a surface at the same angle they struck

          

  20. Convex Mirrorscurved inward

          

  21. Luminous fluxbrightness of the source, more commonly used than luminous intensity, measured in lumens

          

  22. Color of Objectsthe 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

          

  23. Sun not where it appears?light has the properties of both particles and waves

          

  24. Production of Lightall 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

          

  25. Miragechange in density above road is caused by heat, causes the light to bend and never reach the road

          

  26. Reflection of Lightas 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

          

  27. Diverging (concave) lensthinner in the middle and thicker on the ends

          

  28. Virtual Imagecannot 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

          

  29. Luminous Intensitybrightness of the source, measured in candles or candle power

          

  30. Lightsmall portion of the electromagnetic spectrum that our eyes are capable of seeing

          

  31. Index of Refractionas 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

          

  32. Concave Mirrorsfocal length is negative

          

  33. Total Internal Refractionwhen 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

          

  34. Photo Electric Theorywhen 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

          

  35. Farsightedness (hyperopia)the lens can focus near but not far, most young people who need glasses are nearsighted, corrected with a diverging lens

          

  36. Continuous Spectrumgive off their own light, example: sun, light bulb, candle flame

          

  37. Opaque Objectsdo not allow light to pass through, example: solid wall

          

  38. Dual Nature of Lightlight has the properties of both particles and waves

          

  39. Flashlights and spotlihtsthey 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

          

  40. Luminous Objectsgive off their own light, example: sun, light bulb, candle flame

          

  41. Scattering (blue sky)blue wavelengths reflect off air molecules and scatter in all directions

          

  42. Law of Refractionsangle of incidence = angle of reflection

          

  43. Light yearsmall portion of the electromagnetic spectrum that our eyes are capable of seeing

          

  44. Dispersionchange in density above road is caused by heat, causes the light to bend and never reach the road

          

  45. Regular Reflectionangle of incidence = angle of reflection

          

  46. Human Eyecontains 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)

          

  47. Compound lens system(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

          

  48. Transparent Objectsallow light to pass through without distortion, example: clear glass or air