Energy of gamma rays is given by equation

here we know that
h = Planck's constant

now energy is given as


now by above equation



now for wavelength we can say



'A' and 'C' both show that behavior.
'D' also shows it, but the object is moving backwards when time begins.
First it moves faster and faster backwards, then it moves slower and slower backwards.
That n2 = 2*n1. That is, the index of refraction is twice as big in medium 2 since v=c/n
Answer:
True
Explanation:
As the formula for magnitude of a vector v and their components
is

Since
, this means the sum of them,
, is always greater or equal to 