1. D

    Focusing of 2D Parabolic Mirror - Petzval Surface

    Hello everyone, I am currently studying the focusing properties of a 2D parabolic mirror, i.e. the scattered fields resulting from plane wave incidence at oblique angles. For this I am using an own physical optics code and full-wave simulations. What I observe for shallow reflectors is...
  2. U

    QED “All-Path integral approach” for Mirror Reflection

    Hi folks! For mirror reflection I have been puzzled by QED “All-Path integral approach” argument. I appreciate if you examine my article and let me know where I have made my mistakes that my reasoning rejects this QED argument. Let us make an observation; if we turn off the pumps of a fish...
  3. Q

    PLASMA BALL and Concave Mirror Trick

    I recently purchased a plasma ball and was trying to think up tricks to do with it and saw the concave mirror trick online where it creates a virtual image of a ball or a pig or whatever when inside to 2 concave mirrors with a hole in the top one. With that in mind I am wondering what would...
  4. N

    Basic question about primary mirror and focal length

    I have a Cassini PM-160 spherical mirror used in telescopes as the primary mirror. The mirror is concave with a radius of curvature of 2600mm and focal length of 1300mm. I am using the mirror in an imaging application. I have a very basic question. If an on object is located beyond the focal...
  5. avito009

    Properties of concave mirror used for correcting myopia.

    Properties of concave lens used for correcting myopia. Lets try to apply physics practically. I got my new pair of glasses with concave lens used to correct myopia. So I observed something and was curious to know about it. In the beginning for a couple of days when i wore the glasses, nearby...
  6. N

    Concave Mirror

    Q.) A student has three concave mirrors A, B, C of focal lengths 20 cm, 15 cm and 10 cm respectively. Out of the three mirror identify the mirror which would be preferred to be used for shaving purpose.
  7. H

    Light and plane mirror

    Assuming a candle in front of plane mirror the following happens - - - photons from the candle stikes the atoms of silver oxide coated on the back of plane mirror and gets reflected off, my question is does the photon carry the image of the candle with it? Secondly why when we move the plane...
  8. O

    How mirror reflects light in atomic levels?

    Light hits green leaf, we see green light, because green pigment within leaf repel each other, so green light would be reflected, and we see green leaf. Is it corrected concept? Carbon is black, because most of visible wavelengths are absorbed into carbon atom, and nothing is reflected, so...
  9. I

    Need answer on practical use of convex lens and concave mirror

    Hi all, I am an artist that is experimenting with practical use of convex lens and concave mirror in painting, but got stuck with something: image that goes thru the convex lens and gets projected on concave mirror actually gets smaller? Is there a possibility of using a convex lens in static...
  10. S

    model with mirror

    A book is on a horizontal table. Is it possible to read the book easily in a mirror which is placed exactly perpendicular to the table. What is the required minimum number of mirror to make the model and how to make it? Schematic diagram of the problem is attached. The problem can be thought...
  11. K

    problematic spherical mirror focal spot

    hello guys, i monitor with a pixeled camera the focal spot from a spherical mirror but i don't get a nice (even nearly)sperical spot but something weird that shows interference. I woul appreciate a little help. Here are the data (i will make it short, in case anyone can help and need more info i...
  12. A

    Find Focus and Mirror

    Hi everyone! So we have the following: Find 1)the mirror and 2) the focus. Here is what I think: the image is virtual, reversed and bigger than the object.The mirror must then be convex and the focus is to the right of the object? If so, how do I locate it exactly?
  13. P

    Rotation of plane mirror Experiment

    In the experiment Rotation of Plane Mirror: Reflection Lab Part A - YouTube What are some physical applications of the results: i.e. P = 1/2 Q P - Angle of Rotation of Mirror Q - Angle of Rotation of Reflected Ray I think one example is so an automobile can see around a tight corner
  14. W

    Simple Mirror question whats wrong?

    Ok the question is from Schaum's outline: How far should an object be from a concave spherical mirror of radius 36 cm to form a real image one ninth its size? I come up with 1.8 meters the book has .18 meters. My work: focal point = 18 cm All real images on this mirror are inverted thus from...
  15. T

    Concave spherical mirror in a car headlamp

    I'm given only the object distance from the mirror. How would I find the focal length?
  16. V

    Plane Mirror problem

    A point source of light B is placed at a distance L in front of the center of a mirror of width D hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it. The greatest distance over which he can see the image of the light source...
  17. R

    Spherical Concave Mirror

    A spherical concave mirror (not parabolic) has a radius of 4 cm on which a ray is incident 3 cm from the principle axis, as shown in the figure. Since the mirror is not parabolic the ray doesn’t pass through the focus. After reflection on A and then on B, the ray crosses the principal axis at...
  18. J

    Mirror Question

    Standing 2.5 m in front of a plane mirror with your camera, you decide to take a picture of yourself without turning the camera around. To what distance should the camera be focused to get a sharp image? Is there an equation for mirror questions like this?
  19. S

    Dielectric Mirror

    hi guys, I'm required to design a dielectric mirror with TIO2 and SIO2 which reflects 60% to 70% of visible light and transmit the rest. Any hints?
  20. J

    The convergent mirror in this problem is a part of...

    Please help me with this question? a) Hint: The convergent mirror in this problem is a part of a lens/mirror system so the object in this problem may be either real or virtual. Construct a ray diagram. Given: A real object is located to the left of a convergent mirror. The object's distance...