Practicing Success
Practicing Success
CUET Preparation Today
A short pulse of white light is incident from air to a glass slab at normal incidence, after travelling through the slab, the first colour to emerge is |
Blue Green Violet Red |
Red |
We know, v = fλ ⇒ v ∝ λ [ ∴ f = constant] Thus the velocity of red light is highest , so first colour to emerge will have longest wavelength i.e. Red. |
