Why does a soap buuble show beautiful colours, when illuminated by white light ?
Text Solution
Verified by Experts
Light waves reflected from outer and inner surfaces of soap bubble interfere. For different wavelengths, conditions for constructive interference are satisfied at different positions. That is why beautiful colours are seen.
Topper's Solved these Questions
OPTICS
PRADEEP|Exercise Very short answer question|5 Videos
OPTICS
PRADEEP|Exercise very short answer questions|1 Videos
Assertion (A) : Thin films such as soap bubble or a thin layer of oil on water show beautiful colours when illuminated by white light. Reason (R ): The colours are obtained by dispersion of light
Statement I: Thin films such as soap bubble or a thin layer of oit on watar show beautiful colors when illuminated by white light. Statement II: It happens due to the interference of light reflected form the upper surface of thin film.
What colours make up white light ?
A Soap bubble has a thickness of 90 nm and its refractive index is mu" = 1.4" . What colour does the bubble appear to be at a point on its surface closest to an observer when it is illuminated by white light?
Statement-1 : A single lens produces a coloured image of an object illuminated by white light. Statement-2 : The refractive index of material of lens is different for different wavelengths of light.
How could you show that the colours of the spectrum combine to give white light ?
Assertion:- If an object placed on the optic axis of a lens is illuminated by white light, then image formed will be coloured and not exactl white. Reason:- The lens has different focal length sfor different colours.
When viewed in white light, soap bubbles show colours because of
A surface does not eject electrons when illuminated with blue light. Then photo electrons will be ejected when the surface is illuminated by-