1 / 26

Difference between Real and Virtual Images in Optics

Understand the fundamental difference between real and virtual images, as well as the concepts of concave mirrors, parallel light beams, atmospheric refraction, dispersion, colors, mixing paints and colored lights, and thin lenses. Learn how to identify converging and diverging lenses and determine image positions using the lens equation.

zacharyt
Download Presentation

Difference between Real and Virtual Images in Optics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What is the fundamental difference between a real image and a virtual one? • Parallel light rays are focused on the focal point of a concave mirror. Where do you want to place the bulb in a searchlight, which uses a concave mirror , to produce a parallel beam?

  2. Atmospheric Refraction

  3. Dispersion and Colors

  4. One combination of light beams that produces most of the colors that we perceive is red, green and blue. These are primary colors.

  5. Red + Green = Yellow

  6. Blue + Green = Cyan

  7. Red + Blue = Magenta

  8. Two colors that produce white light when added together are called complementary colors.

  9. Mixing Paints and Mixing Colored Lights

  10. Mixing paints is different from mixing colored lights. Mixing paints is subtractive process, whereas with light beams you are adding colors.

  11. Why is the sky blue? Why is the sun yellow?

  12. What color is produced by the overlap of a blue spotlight and a red spotlight? • A surface appear yellow under the white light. How it will appear under red light? Under green light? Under blue light? • A substance is known to reflect red and blue light. What color would it have when it is illuminated by white light? By red light? • If you remove all of the green light from white light, what color would you see?

  13. Rainbows

  14. Thin Lenses

  15. Any lens that is thicker in the center than at the edges will make parallel rays converge to a point and is called a converging lens. Lenses that are thinner in the center than at the edges are called diverging lenses because they make parallel light diverge.

  16. Lenses in eyeglasses are made with one convex surface and one concave surface. How can you tell if the lenses are converging or diverging?

  17. Finding the Image Position Formed by a Thin Lens

  18. ray 1 is drawn parallel to the axis; therefore it is refracted by the lens so that is passes along a line through the focal point; • ray 2 is drawn on a line passing the other focal point F’ and emerges from the parallel to the axis; • ray 3 is directed toward the very center of the lens, this ray emerges from the lens at the same angle as it entered.

  19. The Lens Equation Converging Lens: Diverging Lens:

  20. The focal length is positive for converging lens and negative for diverging. • The object distance is positive if it is on the opposite side of the lens from where the light is coming; otherwise it is negative. • The image distance is positive if it is on the opposite side of the lens from where light is coming. • The height of the image is positive if the image is upright and negative if the image is inverted relative to the object.

  21. Lateral Magnification

More Related