1 / 16

SNC2D

SNC2D. Light and Geometric Optics. Optics is the science dealing with light and vision. Optical means ‘ relating to the eye ’. Light . Light is radiant energy that travels (radiates) outward in all directions from the object giving off the light.

ornice
Download Presentation

SNC2D

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. SNC2D Light and Geometric Optics

  2. Optics is the science dealing with light and vision. • Optical means ‘relating to the eye’

  3. Light • Light is radiant energy that travels (radiates) outward in all directions from the object giving off the light. • Light energy is the form of radiant energy that can be detected by the unaided human eye.

  4. White Light The sun is the most important source of light. The light given off by the sun is called white light.

  5. In the 17th century, Sir Isaac Newton (an English scientist) conducted a famous experiment. He placed a prism in front of a beam of white light and a band of colours emerged. Each band refracted at a different angle, producing a rainbow effect. Newton realized that colour was not added to light, but already present in white light.

  6. Next, Newton passed the band of colours through a reverse prism and this time only the white beam appeared. He proposed that white light is the result of mixing together all of the different colours of light.

  7. The Spectrum When white light is refracted into different colours, the resulting pattern is called a spectrum. For sunlight, the colours range from red through orange, yellow, green, blue, indigo, and violet. (ROY G BIV) The colours are always the same and always in the same order.

  8. The separation of white light into its colours is called dispersion The spectral colours can be mixed together (recombined) into white light by using a prism, lens, or concave mirror.

  9. Light – An Electromagnetic Wave • Visible light is a kind of electromagnetic radiation. Electromagnetic radiation is a form of energy that exhibits wavelike behavior as it travels through space. • Other kinds of electromagnetic radiation are x-rays, ultraviolet and infrared light, microwaves, and radio waves. • Together, all the forms of electromagnetic radiation form the electromagnetic spectrum.

  10. Colours Associated with Visible Light • What we perceive as color is actually different wavelengths. The shortest waves are gamma rays and the longest waves are radio waves. • Visible light falls in between. Red light has the longest wavelength or the colors in the spectrum, and violet has the shortest wavelength.

  11. The visible portion of the electromagnetic spectrum is called the continuous spectrum because the component colours are distinct. The colours appear to be smeared together, but this is not the case.

More Related