Read about white light | 7 Discussions | Page 1

  1. A

    Diffraction Grating and White Light Problem

    Homework Statement White light containing wavelengths from 400 nm to 750 nm falls on a grating with 6000 lines/cm. How wide is the first-order spectrum on a screen 2.0 meters away Homework Equations dsinθ=mλ for constructive interference dsinθ=(m+1/2)λ for destructive interference Δx = λL/d...
  2. Gigi777

    Why does diffracted white light have a white central fringe?

    Hey everybody, Homework Statement : [/B] I came across a question discussing Young's Double Slit interference and was wondering how come when we diffract white light through the slits it gives us a central antinodal fringe that is also white? The question itself came in parts firstly...
  3. Zack K

    B Light produced by stars

    I've been recently watching videos about white light and the double slit experiment and how it creates a rainbow. It let me to some confusion and I would like some clarification. My questions are: Do all stars like ours produce white light? Would red giants only emit red light and blue giants...
  4. Anand Sivaram

    I Perceived Color of objects: in White light from a TV

    Background: Normal white Sun light has a continuous spectrum in the whole of visible range. But, white light (rather what we perceive as white) coming out of a Monitor/TV is have only RGB in it and it looks white because of the Tricolor vision which excites all three types of cells in the eye...
  5. C

    Unexplained bright light

    I was walking into a dark room when a REALLY bright, like laser bright fist sized point of whitish blue light streaked in an irregular pattern just below the ceiling and vanished. It stopped me dead in my tracks startling me, it was moving VERY fast and disappeared within a couple seconds. It...
  6. T

    Questions about rainbows

    I'm interested in rainbows. I'm talking about good old fashioned arc/halo rainbows like those you see in the sky. Sometimes you see rainbows from lawn sprinklers. How small would the smallest rainbow arc conceivably possible to view be? Could I make a rainbow at night using a sprinkler with a...
  7. CAH

    Where is fringe spacing measured from with white light?

    Fringe spacing is the distance between two adjacent maxima or minima. For white light, is a maxima the distance from red to red (green to green, blue to blue..)? or the middle of the maxima to another middle of another maxima (i see that this distance will be the same since its middle to middle...
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