Electromagnetic radiation | Physics | Khan Academy - Diffraction and interference of light | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:electromagnetic-radiation/x6679aa2c65c01e53:wave-behaviors-of-em-radiation/v/diffraction_and_interference_of_light Want to explore more? Check out the full electromagnetic radiation playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HD2AZcy7Pe8mHAiO5UG2WKt Light spreads out when it encounters an obstacle. This process is called diffraction. Diffraction is most noticeable when the obstacle is similar in size to the wavelength of the light. When light waves diffract around obstacles, they overlap each other. This overlap results in constructive and destructive interference at different locations, producing an interference pattern. Sections: 00:00 - Intro 00:49 - Coin in front of a flashlight 01:23 - Hair in front of a laser 02:27 - Diffraction of water waves 06:14 - Effect of wavelength and obstacle size 08:25 - Diffraction of laser light around hair 09:37 - Why Hubble images have spikes 11:17 - Interference of diffracted waves Image credits: "Hubble views the dawn of a Sun-like star" by NASA/ESA, CC BY 2.0 https://www.flickr.com/photos/nasahubble/53723475484/in/album-72157667717916603/ "Monkey Head Nebula" by NASA/ESA, CC BY 2.0 https://www.flickr.com/photos/nasahubble/37929049891/in/album-72157661867344528/ Laguna Superior (16.367952, -94.852309) by Google Maps https://maps.app.goo.gl/K7tnQtFMMtS4Mzoi6 ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc