Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Magnifying glass prism combo

  1. Aug 2, 2014 #1
    Can combining a magnifying glass and a prism make a rainbow capable of ignition?
  2. jcsd
  3. Aug 2, 2014 #2


    User Avatar

    Staff: Mentor

    The magnifying glass would recombine the colors, at least to some extent, so you would probably have a white spot or stripe instead of a rainbow one. Also, to get the rainbow effect you must typically allow only a small strip of light into the prism, which would greatly reduce the amount of light available, possibly too low to ignite anything.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Magnifying glass prism combo
  1. Prism Vs. Glass slab (Replies: 3)

  2. Magnifying Glass & UV (Replies: 2)

  3. Hollow glass prism (Replies: 10)