Thursday, January 18, 2018

Physics 3

പ്രകാശം, അതിൻറെ ഘടകവർണ്ണങ്ങൾ, നിയമങ്ങൾ, ഫോട്ടോ ഇലക്ട്രിക് എഫക്ട് തുടങ്ങിയ ഭാഗങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ ഉൾപ്പെടുത്തിയിരിക്കുന്നത്  
  • Study of light
               Optics
  • Speed of light
               3 x 108
  • Time taken by Sun light to reach Earth
               8 Minute 20 Seconds (500 Sec)
  • Time taken by Moon light to reach Earth
               1.3 Seconds
  • Light travels fastest in
               Vacuum
  • Light is an example of which wave type
               Transverse wave
  • Speed of light was first measured by
               Ole Christian Romer
  • Speed of light is least in which medium
               Diamond
  • Density of light is maximum in which medium
               Diamond
  • Density of light is minimum in which medium
               Vacuum
  • Particles which travels faster than light
               Tachyons
  • Tachyons were discovered by
               ECG Sudarshan
  • Scientist who proved that light is an electro magnetic wave
               Henrich Hertz
  • Unit of wavelength of light
               Angstrom
  • Order of speed of light in different medium is
               Diamond<Glass<Water<Air<Vacuum
  • Rainbow is always formed in 
               Opposite direction of Sun
  • The Direction in which the rainbow is formed in morning
               West
  • Color of sky in moon
               Black
  • Reason for black Color of sky in moon
               Absence of atmosphere
  • When a Red flower is observed through blue glass plate it appears as 
               Black
  • Color of Green leaf in red light
               Black
  • Color which is highly sensitive to human eye
               Yellow
  • Color which is used in danger signals
               Red
  • Color which is used Scientific labs for indicating danger
               Yellow
  • Color used in fog lamp of vehicles
               Yellow
  • Corpuscular theory of Light was proposed by
               Issac Newton
  • Wave theory of Light was proposed by
               Christian Huygens
  • Scientist who discovered that Sun Light consists of 7 colors
               Issac Newton
  • Scientist who discovered that the light fastest in vacuum
               Leon Foucault
  • Principle of three primary colors was proposed by
               Thomas Young
  • Scientist who discovered that constituent colors join together to form composite light
               Issac Newton
  • Electromagnetic wave theory was formulated by
               James Clerk Maxwell
  • Scientist who proved that light is an electromagnetic wave
               Henrich Hertz
  • Phenomenon of emission of electrons from a metal surface such as Sodium or Potassium when light ray falls on it is known as 
               Photoelectric effect
  • Photoelectric effect was proposed by
               Henrich Hertz
  • Photoelectric effect was explained by
               Albert Einstein
  • The law of Photoelectric effect was formulated by
               Albert Einstein
  • Photoelectric effect was explained by Einstein on the basis of
               Quantum theory
  • Photoelectric effect cannot be explained on the basis of
               Electromagnetic theory
  • In 1921 Albert Einstein got Nobel prize for
               Photoelectric effect
  • Number of colors in visible light
               7 (VIBFYOR-Violet, Indigo, Blue, Green, Yellow, Orange and Red)
  • Primary colors are 
               Red, Blue and Green
  • Secondary colors are
               Yellow, Magenta and Cyan
  • Primary colors used in television are 
               Red, Blue and Green
  • Primary color pigments used in printing are 
               Yellow, Magenta, Cyan
  • Colors obtained by mixing any two Primary colors are 
               Secondary Colors
  • Green+Red=Yellow
  • Blue+Red= Magenta
  • Blue+Green= Cyan
  • Any two colors which combined together to form white color is called  
               Complementary Colors
  • Green+Magenta=White
  • Blue+Yellow= White
  • Red+Cyan= White
  • Combining three primary colors we get
               White
  • Distance between Sun and Earth is expressing in  
               Astronomical Unit
  • Wavelength of visible light 
               400-700 nano meter
                                                                                                         (To be Continued...)

1 comment: