How does the sun cause heat on our bodies?

Replies

• 

  Jeffrey Arulraj

  The Observer

  Also contrary to this..
  If light from the sun could make warmth. Why is light from the moon causing a cooler atmosphere?
  
  Is the reflected light from moon also a source of infrared radiation ?

  Moon's light There is nothing called moon's light It is just Sun light reflected
  When Sun energy hits moon The moon gets energized and so it glows and that is why we are able to see it in the night sky
  
  Any Media excited by IR radiation is a source of IR raditaion i.e All Hot bodies can produce IR radiation
• 

  The Observer

  so you mean the light reflected by the moon is of such less intensity that it doesn't have enough IR radiation with it for producing some warmth us on earth 😔 ?
• 

  Jeffrey Arulraj

  The Observer

  so you mean the light reflected by the moon is of such less intensity that it doesn't have enough IR radiation with it for producing some warmth us on earth 😔 ?

  Cent percent
  
  Just imagine this allegory put your hand into fire it can burn your skin really well In the case of a vessel just kept on the flame you can touch the vessel without much change
  
  That is the case here too
  
  Moon reflects sufficient IR needed to sustain the life during the better half of the day
• 

  Anoop Kumar

  Apart from light source there are two more factor come with sun light/
  Ultra-violet rays + infrared.
  
  Ultra-violet makes sun rays hotter and is main reason of sunburn, basically because it is causes ionization.
  Reason is having more energy electron at higher frequency 8*1014 to 3*1016 Hz. while visible light frequency ranges from 4*1014 Hz to 8*1014 Hz.
  
  See here: #-Link-Snipped-#
• 

  The Observer

  ianoop

  Apart from light source there are two more factor come with sun light/
  Ultra-violet rays + infrared.
  
  Ultra-violet makes sun rays hotter and is main reason of sunburn, basically because it is causes ionization.
  Reason is having more energy electron at higher frequency 8*1014 to 3*1016 Hz. while visible light frequency ranges from 4*1014 Hz to 8*1014 Hz.
  
  See here: #-Link-Snipped-#

  but light is considered to be of photons right?
• 

  Anoop Kumar

  Yes, light consist photon but sun rays consist radiation too which is not visible via necked eyes.
  Ultra voilet + infrared. Thank to Ozon layer which absorbs most of the uv rays.
  
  Try Halogen bulb 😀
• 

  The Observer

  ianoop

  Yes, light consist photon but sun rays consist radiation too which is not visible via necked eyes.
  Ultra voilet + infrared. Thank to Ozon layer which absorbs most of the uv rays.
  
  Try Halogen bulb 😀

  oh. yes. now that fits the theory well . thanks.
• 

  Ramani Aswath

  Sunlight intensity on earth surface - 100,000 lux
  Moonlight intensity on earth surface - 0.2 lux
  This should explain all.
• 

  Anoop Kumar

  True, but if you observe sunlight feels like an arrow when you are near to equator. Because it less reflected through air.
  
  Ok, how many of us, here, believe that sun intensity also depends on earth and sun distance?
• 

  Jeffrey Arulraj

  ianoop

  Ok, how many of us, here, believe that sun intensity also depends on earth and sun distance?

  I believe and I am sure all will believe
  
  That is one of the reasons why winter day are more pleasant in Chennai,India When compared to Day time during the month of May
  
  Such a small variation in distance has resulted in nearly 10 degree drop in temperature
  
  PS: Temperature is a measure of heat falling on the surface right?
• 

  Ramani Aswath

  There is no great difference in distance between winter and summer. The angle of incidence changes. The intensity at any angle = intensity at normal incidence x cos(angle of incidence)
• 

  Anoop Kumar

  Jeffrey Samuel

  I believe and I am sure all will believe
  
  That is one of the reasons why winter day are more pleasant in Chennai,India When compared to Day time during the month of May
  
  Such a small variation in distance has resulted in nearly 10 degree drop in temperature
  
  PS: Temperature is a measure of heat falling on the surface right?

  So, sun is farthest when it's winter?
• 

  Saandeep Sreerambatla

  My understanding here is , we sweat and we feel our bodies heated when exposed to sun because 70% of the body is made up of water.
  
  And because of the suns heat, we feel our bodies heated.
  
  I think, this is the reason we should wear pressurized suits if we are above the amstrong's limit as water boils not at 100C but at much less temperature.