General Knowledge

RAYS AND WAVES

IMPORTANT INFORMATION ABOUT RAYS AND WAVES

  1. Gamma rays are considered the death rays.

  2. Gamma rays travel with the velocity of light

  3. Gamma rays have maximum penetrating power

  4. Shortest wavelength among alpha, beta and gamma is of gamma rays

  5. Laser rays are used in micro surgery

  6. Alpha radiations produce burns on human body

  7. Newton proved that sunlight consists of different colors

  8. Beta rays are fast moving electrons.

  9. Color with shortest wavelength is Blue

  10. Violet have shortest wave length and Red has longest wavelength (vibgyor)

  11. Red light’s wave length is 11800 waves/cm (< infra red)

  12. Least deviated color in prism is red

  13. Greatest deviated color in prism is indigo (chk violet)

  14. Violet light’s wave length is 23600 waves/cm (> ultra violet)

  15. Ultraviolet rays are less than 3000 deg: A

  16. Greatest value of wavelength is of infra red

  17. Visible waves are between 400-700 nanometers.

  18. MOTE = Million Tons of oil equivalent

  19. REM = Roentgen equivalent in man

  20. Transverse waves can only be produced in solids

  21. Longitudinal waves can be produced in solids, liquids and gases

  22. On passing thought food stuff, x-ray can kill bacteria

  23. Violet color of light t ravel thought glass with minimum speed

  24. There is no wavelength of light for color brown.

  25. White light is a mixture of all the colors in the rainbow.

  26. Blue has the shortest wavelength and red the longest.

  27. Radio waves also come from sun and outer space. Astronomers use radio telescope to hear them.

  28. Radar uses microwaves.

  29. Anything that is warm produces infrared waves including us. The hotter the thing the more IR.

  30. Infrared waves are used in TV remote control.

  31. X-rays have shorter wavelength and more energy than ultraviolet rays.

  32. Gamma rays come from radioactive materials. They are used to kill cancers.

  33. Without exposure to ultraviolet light our bodies would not be able to make vitamin D.

  34. UHF, ultra high frequency are radio waves used for TV broadcast

  35. Microwaves are used in radar, mobile phones, microwave oven, communication network

  36. Each light color is of different wavelength.

  37. Red light has the longest wavelength while violet light has the shortest.

  38. Waves with a longer wavelength than red light are invisible they are called infrared waves.

  39. Invisible Ultraviolet wave have wavelength shorter than violet light.

  40. Red, Blue, Green are prime colors.

  41. Red + Blue + Green = white

  42. The wavelength of visible light is between 1350-2500

  43. An object that reflects all the light looks white.

  44. Loud speaker converts electrical energy into sound energy.

  45. Light coloured clothes are generally worn in summer

  46. The electrical device which transform voltage : transformer

  47. A nuclear reaction in which two or more than two lighter nuclear are fused together to form a relatively heavier one : nuclear fusion

  48. The three colours combination which produces the sensation of white light : Red green and blue

  49. The clear sky looks blue because of dispersion of light

  50. When light waves travel from air to glass the wavelength and velocity variables are affected.

  51. Electrical lines of forces are imaginary.

  52. Frequency distinguishes ultrasound from normal audible sound. Its f > 20,000 Hz.

Past Questions

About Islam

  1. Important Questions about Islamic Studies
  2. Hazrat Muhammad PBUH
  3. General Knowledge About Hazrat Muhammad PBUH Life
  4. Wives of Hazrat Muhammad PBUH
  5. Important Islamic History Events
  6. Important points of The Holy Quran
  7. Al-Quran MCQs
  8. About SAHABA KARAM
  9. Namaz
  10. Zakat
  11. Fasting (Roza)
  12. Imortant Article of Faith and Fundamental of ISLAM
  13. Important Islamic terms and Places
  14. Islamic Months of Years
  15. General Knowledge-Heavenly Books
  16. Important Angles
  17. Ashra-e-Mubrashra
  18. Reign Of 4 Caliphates(Khulafa Rashideen)
  19. Famous Islamic Generals
  20. Famous Islamic Battles
  21. Important Personalities and Their Titles in Islam
  22. Famous Muslim Scientists

  23. PPSC GENERAL KNOWLEDGE
  24. PPSC PAST Papers General Knowledge Questions


  25. About World

  26. World Records
  27. World Records (Guniees Book)
  28. 7 Wonders of the World
  29. Inventions and Inventors
  30. Important Facts of Worlds
  31. Important Places Of World
  32. Important Awards Of World
  33. Top 10 Languages of World
  34. Highest Military Awards of World
  35. Important Geographical Lines of World
  36. World Imortant National Days
  37. Importnat Religions of World
  38. Important Political terms and concepts
  39. Important News Agency of the World
  40. About UNO
  41. Organs of UNO
  42. Important Specialized agency of the UNO
  43. World Country with Capitals & Currency
  44. Famous Name of Places(Country)

  45. About Pakistan
  46. Basic Information About Pakistan
  47. Districts of Pakistan
  48. RIVERS OF PAKISTAN
  49. The Largest in Pakistan
  50. The Longest and Tallest in Pakistan
  51. Mountain Passes in Pakistan
  52. Chairman Senate and seats Distibutions of Pakistan
  53. Chief Justices of Pakistan
  54. Pakistan Affairs
  55. Who is First in PAKISTAN
  56. PAKISTAN GOVERNOR GENERALS
  57. PAKISTAN Presidents
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  59. Attorney Generals of Pakistan
  60. State Bank Governors of pakista
  61. Army Chiefs of PAKISTAN
  62. Federal Cabinet of PAKISTAN
  63. Location of important Metalic and Non Metalic Minerals
  64. Constitutional Amedments Since 1973
  65. Army,PAF and Navy Officer Ranks
  66. Who is Who and What is What

  67. MOUNTAINS
  68. IMPORTANT MOUNTAIN PASSES
  69. OCEANS
  70. FAMOUS SEA PORTS
  71. FAMOUS STRAITS
  72. WORLD RIVERS
  73. FAMOUS ISLANDS
  74. FAMOUS DESERTS
  75. CITIES ON RIVER BANKS
  76. GEOGRAPHICAL DISCOVERIES
  77. WORLD COUNTRIES
  78. GENERAL KNOWLEDGE ABOUT WORLD
  79. IMPORTANT PHYSICAL PROPERTIES
  80. Ten LARGEST COUNTRIES BY AREA
  81. IMPORTANT ABBREVIATIONS
  82. IMPORTANT UNITS OF MEASUREMENT
  83. IMPORTANT INFORMATION ABOUT RAYS AND WAVES
  84. IMPORTANT INFORMATION ABOUT UNIVERSE
  85. NOBLE PRIZE
  86. NATIONAL EMBLEM
  87. FAMOUS EPITHETS
  88. IMPORTANT GEOGRAPHICAL LINES OF WORLD
  89. About Science
  90. Basic Geometry Math Defination
  91. Important Units of Measurments
  92. Basic Scientific Questions