What do a soap bubble and a blue morpho butterfly have in common? Their wonderful vibrant colours? That's correct! Let's understand how thin film interference leads to such vibrant colours.

00:00 Introduction
00:48 Breaking down the phrase - Thin film interference
01:50 Zooming into the soap bubble
03:21 Path difference between two light waves
04:03 Constructive and Destructive interference
05:38 Varying thickness of the film changes the colours we see
06:00 Why is the blue morpho butterfly blue?
06:54 Why don't we see colours in a liquid drop or a window pane

Check out more videos and exercises on Wave optics - https://www.khanacademy.org/science/i...

To get you fully ready for your exam and help you fall in love with Physics, find the complete bank of exercises and videos for Class 12 Physics here - https://www.khanacademy.org/science/i...

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy.

Subscribe to our YouTube channel -    / khanacademy  

As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?ut...

Created by Vibhor Pandey