When white light moves through vacuum

Question

When white light moves through vacuum (A) all colours have same speed (B) different colours have different speeds (C) violet has more speed than red (D) red has more speed than violet.

Tardigrade Admin · Accepted Answer

In vacuum all colours have same speed, because there is no dispersion of light in vacuum.

Q. When white light moves through vacuum

all colours have same speed

different colours have different speeds

violet has more speed than red

red has more speed than violet.

In vacuum all colours have same speed, because there is no dispersion of light in vacuum.