1. A

    Putting a slab of refractive index [math]\mu[/math] and width [math]D[/math] in front of slits in YDSE.

    If I put a slab of some material whose refractive index is \mu and width is D, In the figure you can see that I have placed the slab just after the slits. So, when rays gonna come out of the slab they will bend away from normal (here I'm assuming that the material...
  2. TyrannosaurusWreck


    I have to do these problems- A red ray and a blue ray each pass from air into silica at an incident angle of 29.00°. How large is the angle between the two refracted rays? Red light has an index of refraction in silica of 1.459 and blue light has an index of 1.467. A narrow ray of white...
  3. Z

    Air refraction as function of TEMPERATURE

    I have been looking for a chart/function but couldnt find. I need it to do studies on a Schlieren set-up, which relies on the difference of density, thus variations of the air refraction, to make air flow visible. Hereby I attach a video that explains it better QpP4qM8wcNM So, I...
  4. G

    Light and Refraction

    So I have a homework problem that I am confused about. The problem is: An insulated light bulb is at the bottom of a swimming pool 2.5m from the wall. The pool is 2.5m deep and is completely filled with water. At what angle does the light break the water at the edge of the pool? N for water...
  5. H

    Does Fermat principle explain refraction inside water?

    A light ray is the fastest route between two points P and Q,but what if Q is at the bottom of the sea so that light cannot reach it?
  6. L

    formula of refraction at spherical surface

    i am confused which eqaution to use for formula of refraction at spherical surface , do i need to put a modulus for n2-n1 ? some book gives modulus , while the other book not . which one is correct?
  7. L

    Position of image after two refraction

    A point object is 25cm from the centre of glass sphere of radius 5cm. The refractive index of glass is 1.5 . Find the position of image formed by the refraction by first refracting surface . my ans is (1/00/20) + (1.5/v) = (0.5/5) , finally i get v = +30cm.. i am having problem with the...
  8. L

    refraction at spherical surface

    in the photo, i dont understand part b , why the u(object distance) form the refracting surface is 14 cm . can someone help me with this?
  9. M

    Photon/QM , Explanation/Mechanism, For Refraction ?

    Is there a photon/QM explanation and mechanism for refraction of light? The wave explanation: Huygens construction showing waves slowing in a dielectric medium because of the interaction of the electric field vector of the EM wave interacting with electrons in the medium. This results in...
  10. M

    Mechanism in Refraction of Light

    Huygen showed that the wavelength in a refractive medium is shorter proportional to the lower velocity :wavelength(2) = wavelength(1) v/c What is the mechanism for the decrease in wavelength in terms of the time varying electric field of the EM wave and the interaction with the electrons in the...
  11. H

    Refraction of light

    Hello, I am in final year studying product design. I am currently in the process of having my project approved. My project proposal is about treating jaundice in developing countries where communities have a lack of electricity. Jaundice can have devastating consequences if not treated such as...
  12. Germanlongstrike


    hello, I have a little question about refraction of light. As refraction is the bending of light when it passes from lower density to higher density or vice-verse, but what's the reason which makes light bend. It should just pass into it, in the same direction but with a reduction in it's...
  13. K

    reflection and refraction

    Hi! So this is a question from reflection and refraction, and I have to find angle deta
  14. T

    A Level Basic Refraction Help

    Hi guys, wondering if anyone can help me on this specific questions? Assume refractive index of air = 1 Speed of light in air = 3x10^8 ms Question 9c: Cheers guys really appreciate it!!
  15. A

    Refraction of Light

    The figure shows a surface XY separating two transparent media, medium 1 and medium 2. The lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. The lines ef and gh represent wavefronts of the light wave in medium 2 after refraction. We conclude that...
  16. D


    why should the length of a normal be at least 6cm while finding the angle of refraction?
  17. M

    Is Snell's law of refraction a derived ?

    one or an emperical one? Can you help me find it derivation,
  18. A

    multi-surface problem in refraction at spherical surface.

    i've tried this about 9 times and none of my answers seem right and would LOVE some help. any suggestions? A thick-walled spherical shell made of transparent glass (n=1.50) has internal radius R and external radius 2R. The central cavity and region surrounding the shell are filled with air...
  19. A

    Electron refraction

    A parallel beam of electrons is moving with velocity v is incident normally on a thin graphite film of atomic spacing 1.2*10^-10 m. The beam is diffracted through an angle of 11 degrees, where 2dsin theta=lambda, the wavelength value. Calculate the wavelength, velocity v and the accelerating...
  20. G

    Why do we see colours in bubbles?

    Colours can be seen moving around in a blown soap bubble. Explain how these are formed and why they move. I'm guessing it is something to do with the thickness of the bubble and light being somehow split but i'm not too sure other than that.