Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
abhishek indrajit karadkar Grade: 12
        my doubt is that everyone knows that velocity of light is constant everywhere in universe.then why does velocity of light decreases when light passes through any denser medium like glass or water with respect to air.
7 years ago

Answers : (3)

Devasish Bindani
45 Points

the velocity of light is constant not in whole universe it depends from medium to medium there may be a constant speed of light in one medium but it may be some other in other medium.

Many scientist have tried to explain this phenomena Eienstein has said that when light travels in the form of packets i.e. photons . when this light enters from one medium to another then these photons strike the molecules present in medium and thus their speed slows down just like hurdles kept in ones way.

7 years ago
Ravi Kumar
20 Points

the velocity of light in a medium is constant everywhere. what confused you must have been an ambiguous statement that didnt say anything about the medium. for eg. the velocity of light in vacuum is constant everywhere in the universe i.e. approximated to 3 * 10^8 m.s^-1

7 years ago
vikas askiitian expert
510 Points

velocity of light in medium is related to refractive index of that medium as

         c/v =u (refractive index) 

 c is speed of light vaccume

 so,           v is inversly proportional to refractive index

      therefore on passing through dencer media speed gets reduced...



7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete Physics Course - Class 12
  • OFFERED PRICE: Rs. 2,756
  • View Details
  • Complete Physics Course - Class 11
  • OFFERED PRICE: Rs. 2,968
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details