Why doesn't the light from the two headlights of a distant car produce an interference pattern?
Step 1 of 3
For interference to happen the two sources should have coherence. In the double slit this is achieved by using one source and splitting the beam using 2 pinholes. In the case of car headlights, the two sources are independent and have no coherence. The phase of light emitted by one headlight world have a random relation with the light from the other headlight, and there will be no interference. Even if the the headlights were coherent the interference pattern created would be so dense as to be invisible because the separation between the two headlights is very large compared to the wavelength of the light.
Textbook: Physics: Principles with Applications
Author: Douglas C. Giancoli
Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204. Since the solution to 10Q from 24 chapter was answered, more than 605 students have viewed the full step-by-step answer. The answer to “Why doesn't the light from the two headlights of a distant car produce an interference pattern?” is broken down into a number of easy to follow steps, and 16 words. This full solution covers the following key subjects: Car, distant, doesn, headlights, interference. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. The full step-by-step solution to problem: 10Q from chapter: 24 was answered by , our top Physics solution expert on 03/03/17, 03:53PM.