23 true or false frequency and wavelength are

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23. True or False: Frequency and wavelength are directly proportional to one another. __FALSE_________ 24. Light, X-rays, and radio waves are all members of the ___ELECTROMAGNETIC________ spectrum. 25. Red light is (higher, lower) in frequency than violet light. __LOWER__ 26. A beam of light that has all of its waves pulsating in unison is called a(n) ___LASER________. 27. One model of light depicts it as consisting of energy particles known as _PHOTONS__________. 28. True or False: The energy of a light particle (photon) is directly proportional to its frequency. ___TRUE________ 29. Red light is (more, less) energetic than violet light. ___LESS__ 30. A hard, brittle, amorphous substance composed mainly of silicon oxides is ___GLASS________. 31. Glass that can be physically pieced together has __INDIVIDUAL__ characteristics. 32. The two most useful physical properties of glass for forensic comparisons are _____DENSITY______ and _____REFRACTIVE INDEX______. 33. True or False: Automobile headlights and heat-resistant glass, such as Pyrex, are manufactured with lime oxide added to the oxide mix. __FALSE_________ 34. ___TEMPERED________ glass fragments into small squares, or “dices,” with little splintering when broken. 35. __LAMINATED_________ glass gains added strength from a layer of plastic inserted between two pieces of ordinary window glass; it is used in automobile windshields. 36. Comparing the relative densities of glass fragments is readily accomplished by a method known as __FLOTATION_________. 37. When glass is immersed in a liquid of similar refractive index, its __BECKE LINE _________ disappears and minimum contrast between the glass and liquid is observed. 38. The exact numerical density and refractive indices of glass can be correlated to __FREQUENCY OF OCCURRENCE_________ in order to assess the evidential value of the comparison.
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39. The fracture lines radiating outward from a crack in glass are known as __RADIAL _________ fractures. 40. A crater-shaped hole in glass is (narrower, wider) on the side where the projectile entered the glass. 41. True or False: It is easy to determine from the size and shape of a hole in glass whether it was made by a bullet or some other projectile. __FALSE_________ 42. True or False: Stress marks on the edge of a radial crack are always perpendicular to the edge of the surface on which the impact force originated. ___FALSE________ 43. A fracture line (will, will not) terminate at an existing line fracture. __WILL__ 44. Glass fracture lines that encircle the hole in the glass are known as _CONCENTRIC______ fractures. 45. When glass’s elastic limit is exceeded, the first fractures develop into radial lines on the surface of the (same, opposite) side to that of the penetrating force. __OPPOSITE__ 46. Collected glass fragment evidence should be packaged in __SOLID_________ containers to avoid further breakage. 47. Glass-containing shoes and/or clothing should be individually wrapped in ___PAPER ________ and transmitted to the laboratory
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  • Fall '19
  • Light, Wavelength, refractive index

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