Researcher calculates Santa's speed on Christmas Eve—and this is what it would do to Rudolph's nose
With billions of children around the world anxiously waiting for their presents, Father Christmas (or Santa) and his reindeer ...
unilad13d
Apocalyptic video shows what would happen if a needle hit Earth at the speed of light
Even a sewing needle measuring just 35mm could cause significant damage if moving at an absurdly high speed, resulting in ...
BBC4y
Refraction of light Refractive index
is. Light of frequency \(4.6\times 10^{14}Hz\) travels at a speed of \(1.24\times 10^{8}ms^{-1}\) in diamond. Calculate the refractive index of diamond for this colour of light.
BBC4y
Refraction and angle of incidence
The change in direction of a ray depends on the change in the speed of the light and can be used to calculate the refractive index. For the example above the refractive index \(n\) of the glass is ...