Can a Magnifying Glass and Prism Create an Ignitable Rainbow?

  • Thread starter Thread starter Graze
  • Start date Start date
  • Tags Tags
    Glass Prism
AI Thread Summary
Combining a magnifying glass and a prism does not create an ignitable rainbow. The magnifying glass can recombine colors, resulting in a white spot or stripe rather than a rainbow. Achieving a rainbow effect requires a narrow strip of light entering the prism, which significantly reduces the light intensity. This diminished light may not be sufficient to ignite any material. Therefore, the combination is unlikely to produce an ignitable rainbow.
Graze
Messages
1
Reaction score
0
Can combining a magnifying glass and a prism make a rainbow capable of ignition?
 
Science news on Phys.org
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.
 
Thread 'A quartet of epi-illumination methods'

Thread 'A quartet of epi-illumination methods'

Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
View full post »

Thread 'Effective absorption coefficient of gold nanoparticles'

I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
View full post »

Similar threads

B Can a magnifying mirror or prism be used somehow as a low-tech reading aid for the visually impaired?
Replies
11
Views
2K
I Prism Spectrometer Objective: Optics Question
Replies
9
Views
2K
Directing sunlight into the optical fiber
Replies
8
Views
4K
I Is This....Right? Splitting LED colors is not working for me
Replies
40
Views
3K
I On Mixing Colors of Light
5
Replies
207
Views
12K
Fermat's Principle, Snell's Law, and the Prism
Replies
8
Views
3K
Glass prism and its refractive index
Replies
1
Views
2K
How to Calculate Dimensions for a Magnifier and Thin Prism Working Together?
Replies
1
Views
2K
Polarized Glasses plus Windshield Tint = Rainbows
Replies
1
Views
2K
Can light be split by colour accurately?
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top