General Knowledge - Physics - Discussion
Discussion Forum : Physics - Section 1 (Q.No. 43)
43.
Light travels at the fastest speed in
Discussion:
13 comments Page 1 of 2.
PRAMOD said:
1 decade ago
Even glass is a solid but how can you consider velocity of sound as highest in steel in one case and in vaccuum in other case. ?
Nishtha said:
1 decade ago
@Pramod
Sound can not travel through vacuum, it needs a material medium to travel.
Speed of sound is directly proportional to the density of the medium ie more the density more will be the speed that's why it travels fastest in solids and slowest in gases.
By the way the question was about speed of light!
Sound can not travel through vacuum, it needs a material medium to travel.
Speed of sound is directly proportional to the density of the medium ie more the density more will be the speed that's why it travels fastest in solids and slowest in gases.
By the way the question was about speed of light!
Teiju(rk valley) said:
1 decade ago
Your right Nishitha.
Vivetha.h said:
1 decade ago
Just please tell me the clear explanation for this answer.
Kriti said:
1 decade ago
Light waves are transverse waves they do not require material medium to travel. Hence they are called electromagnetic waves. Light waves travel in vacuum with the velocity 3*10^7 m/s.
(1)
Lidiya said:
1 decade ago
@kriti.
Light velocity is 3*10^8 m/s.
Light velocity is 3*10^8 m/s.
Vignesh.... said:
1 decade ago
Vacuum tube have not any disturbance.
Danial said:
1 decade ago
The velocity of light in air is 3*10^8m/s.
The velocity of light in vacuum is 2.888*10^8 m/s.
The velocity of light in vacuum is 2.888*10^8 m/s.
Harshit said:
1 decade ago
The speed of light at which light propagates through glass and air is less than c and because the value of c is less so the refractive index value is also decreases the refractive index is the ratio of c and the velocity of light in material thats why the speed of light is fastest in vacuum.
Tffhgjk said:
1 decade ago
Speed of light in vacuum is 3*10^8 this is because there are less or no particles or gravity to slow it down.
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