- #1
katatonia911
- 2
- 0
hi,
im not involved into physics but i read sometimes about it and have very curious questions:
Q1-
if E=mc2 then as i know that electromagnetic waves have mass of zero
so this mean E=0xc2 which means that c2=E/0
here i get that the E=0 , and c=infinite..which i guess is impossible
so what is wrong in my understanding of the equation?Q2-
since the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 200,000 km/s; the refractive index of air is about 1.0003, so the speed of light in air is very close to c.
what is the factor that increase the refractive index??
and if we supposed that we have a material of a very high refractive index which its value ≈ 300,000,000 what will will happen to the light? will it become somthing with mass that we can see?
Q3-
i always read when people talking about light travel speed as if light is something fixed but as i know its composed of different waves with different frequencies (rainbow colors, infra-red,UV,..) ..its getting me crazy
i don't get it.when scientists put their calculations do they put these fact's in their mind?
how they deal with it?thank you all
im not involved into physics but i read sometimes about it and have very curious questions:
Q1-
if E=mc2 then as i know that electromagnetic waves have mass of zero
so this mean E=0xc2 which means that c2=E/0
here i get that the E=0 , and c=infinite..which i guess is impossible
so what is wrong in my understanding of the equation?Q2-
since the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 200,000 km/s; the refractive index of air is about 1.0003, so the speed of light in air is very close to c.
what is the factor that increase the refractive index??
and if we supposed that we have a material of a very high refractive index which its value ≈ 300,000,000 what will will happen to the light? will it become somthing with mass that we can see?
Q3-
i always read when people talking about light travel speed as if light is something fixed but as i know its composed of different waves with different frequencies (rainbow colors, infra-red,UV,..) ..its getting me crazy
i don't get it.when scientists put their calculations do they put these fact's in their mind?
how they deal with it?thank you all
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