In a thin film of soap, why do we see different colors when viewed at different
Practice Questions
Q1
In a thin film of soap, why do we see different colors when viewed at different angles?
Due to diffraction
Due to varying thickness of the film
Due to reflection only
Due to absorption of light
Questions & Step-by-Step Solutions
In a thin film of soap, why do we see different colors when viewed at different angles?
Correct Answer: Different colors are seen due to interference of light waves reflected from different thicknesses of the soap film, which changes with angle.
Step 1: Understand that a thin film of soap is like a very thin layer of liquid that can reflect light.
Step 2: When light hits the soap film, some of it reflects off the top surface and some goes through and reflects off the bottom surface.
Step 3: The light waves that reflect from the top and bottom surfaces can interfere with each other. This means they can combine in ways that make some colors brighter and others dimmer.
Step 4: The thickness of the soap film can change depending on the angle you are looking at it. When you change your angle, you change how thick the film appears to be.
Step 5: Because the thickness changes with angle, the way the light waves interfere also changes, leading to different colors being visible.
