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.

Who is Who and What is What

  1. MOUNTAINS
  2. IMPORTANT MOUNTAIN PASSES
  3. OCEANS
  4. FAMOUS SEA PORTS
  5. FAMOUS STRAITS
  6. WORLD RIVERS
  7. FAMOUS ISLANDS
  8. FAMOUS DESERTS
  9. CITIES ON RIVER BANKS
  10. GEOGRAPHICAL DISCOVERIES
  11. WORLD COUNTRIES
  12. GENERAL KNOWLEDGE ABOUT WORLD
  13. IMPORTANT PHYSICAL PROPERTIES
  14. Ten LARGEST COUNTRIES BY AREA
  15. IMPORTANT ABBREVIATIONS
  16. IMPORTANT UNITS OF MEASUREMENT
  17. IMPORTANT INFORMATION ABOUT RAYS AND WAVES
  18. IMPORTANT INFORMATION ABOUT UNIVERSE
  19. NOBLE PRIZE
  20. NATIONAL EMBLEM
  21. FAMOUS EPITHETS
  22. IMPORTANT GEOGRAPHICAL LINES OF WORLD

  23. About Islam

  24. Hazrat Muhammad PBUH
  25. General Knowledge About Hazrat Muhammad PBUH Life
  26. Wifies of Hazrat Muhammad PBUH
  27. Important Islamic History Events
  28. Important points of The Holy Quran
  29. Al-Quran MCQs
  30. About SAHABA KARAM
  31. Namaz
  32. Zakat
  33. Fasting (Roza)
  34. Imortant Article of Faith and Fundamental of ISLAM
  35. Important Islamic terms and Places
  36. Islamic Months of Years
  37. General Knowledge-Heavenly Books
  38. Important Angles
  39. Ashra-e-Mubrashra
  40. Reign Of 4 Caliphates(Khulafa Rashideen)
  41. Famous Islamic Generals
  42. Famous Islamic Battles
  43. Important Personalities and Their Titles in Islam
  44. Famous Muslim Scientists
  45. Important Questions about Islamic Studies

  46. PPSC GENERAL KNOWLEDGE
  47. PPSC PAST Papers General Knowledge Questions


  48. About World

  49. World Records
  50. World Records (Guniees Book)
  51. 7 Wonders of the World
  52. Inventions and Inventors
  53. Important Facts of Worlds
  54. Important Places Of World
  55. Important Awards Of World
  56. Top 10 Languages of World
  57. Highest Military Awards of World
  58. Important Geographical Lines of World
  59. World Imortant National Days
  60. Importnat Religions of World
  61. Important Political terms and concepts
  62. Important News Agency of the World
  63. About UNO
  64. Organs of UNO
  65. Important Specialized agency of the UNO
  66. World Country with Capitals & Currency
  67. Famous Name of Places(Country)

  68. About Pakistan
  69. Basic Information About Pakistan
  70. Districts of Pakistan
  71. RIVERS OF PAKISTAN
  72. The Largest in Pakistan
  73. The Longest and Tallest in Pakistan
  74. Mountain Passes in Pakistan
  75. Chairman Senate and seats Distibutions of Pakistan
  76. Chief Justices of Pakistan
  77. Pakistan Affairs
  78. Who is First in PAKISTAN
  79. PAKISTAN GOVERNOR GENERALS
  80. PAKISTAN Presidents
  81. PAKISTAN Prime Ministers
  82. Attorney Generals of Pakistan
  83. State Bank Governors of pakista
  84. Army Chiefs of PAKISTAN
  85. Federal Cabinet of PAKISTAN
  86. Location of important Metalic and Non Metalic Minerals
  87. Constitutional Amedments Since 1973
  88. Army,PAF and Navy Officer Ranks
  89. About Science
  90. Basic Geometry Math Defination
  91. Important Units of Measurments
  92. Basic Scientific Questions