A question about mirrors and images

  • Thread starter Thread starter pkpaul26
  • Start date Start date
  • Tags Tags
    Images Mirrors
AI Thread Summary
When two mirrors are positioned at an angle that results in a fractional division of 360 degrees, the number of images formed of an object placed between them can be calculated using the formula n = 360/θ - 1, where θ is the angle between the mirrors. For example, with an angle of 72 degrees (1/5 of 360), five images will be created. The discussion encourages experimentation with different fractions, such as 2/5, to observe the resulting number of images. This exploration highlights the relationship between the angle and the number of reflections. Understanding this concept is essential for predicting image formation in mirror setups.
pkpaul26
Messages
3
Reaction score
0
If two mirrors are placed at such an angle so that when 360 degree is divided by that angle the result is a fraction.then if an object is placed between the two mirrors how many images of that object will be formed?

Proof is needed.
 
Science news on Phys.org
hi pkpaul26! welcome to pf! :smile:

in other words, if the angle is p*360°/q ?

try it first with p/q =1/5, then 2/5, to see how it works :wink:
 
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...
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...
Back
Top