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33 Cards in this Set
- Front
- Back
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The Speed of Light |
186,000 mi/s or 3.00 x 10^8 m/s |
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Light Year |
9.46 x 10^15 meters |
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Law of Reflection |
The angle of incidence is equal to the angle of reflection |
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Law of Reflection
Angle of Incidence
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Angle formed between the incident ray and the normal |
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Law of Reflection
Angle of Reflection
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Angle formed between the reflected ray and the normal |
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Real image with example |
Light rays DO originate from a given object or from the other image
Ex: An image displayed on a movie screen |
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Virtual Image |
A mirror image is formed where the rays of light APPEAR to originate
Ex: Mirror shows reflection; What you see in the mirror is opposite or you in person |
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Curved Mirrors |
Widens your field of view; makes objects appear closer than they are |
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Concave Mirror |
Curves away from you
Ex: Vanity Mirror |
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Convex Mirror |
Curves towards you
Ex: Side mirror on car |
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Refraction Light |
The Change of direction of a light ray at the boundary between the two materials
Ex: Pencil in a cup of water |
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How does the speed of light in a different materials affect the direction of refraction? |
Refraction results from a change in speed when the light passes from one transparent material into another and since light is moving at a slower speed than in air the ray is refracted towards the normal |
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Converging Lenses |
A lens that converts parallel rays of light to convergent rays and produces a real image |
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Diverging Lenses |
A lens that causes a beam of parallel rays to diverge after refraction |
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Which type of lens is used to treat farsightedness |
Convex lens (Also known as a converging lens) |
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Which type of lens is used to treat nearsightedness |
Concave Lens (Also known as a diverging lens) |
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Telescopes |
Optical instruments used to provide enlarged images of near and distant objects |
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Telescopes
Refracting
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Uses two lenses, with the objective lens forming a reduced image, which is viewed with an eyepiece lens to enlarge that image. |
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Telescopes
Reflecting
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Uses a combination of mirrors (or a mirror and a lens) to collect light |
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How does a periscope work? |
The mirrors are fitted at each end of the tube at an angle of exactly 45 degrees so they are able to face each other. Light then hits the top mirror at 45 degrees and reflects away at the same angle. The light then bounces down to the bottom mirror displaying the image. |
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What does Light behave like? |
Newton developed his particle theory saying light is a stream of particles however Huygens believes that light is not a stream of particles but rather a longitudinal wave. Both theories are plausible |
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What is the photoelectric effect |
The movement of electrons as a result of energy acquired from light
Ex: Electron is ejected from a material (metal) because it has absorbed light. The theory of light behaves as a particle goes with this effect
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What is the source of light |
Light is formed by electrons releasing energy |
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Ground State of an atom |
All electrons are in the lowest possible energy level |
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An excited state of an atom |
Electrons have the highest level of energy and eventually release energy to create light |
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Electromagnetic Radiation |
Form of radiant energy released by certain electromagnetic processes. |
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Electromagnetic Radiation
Radio Waves
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Electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light |
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Electromagnetic Radiation
Microwaves
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The distance between repeating units of a propagating wave of a given frequency |
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Electromagnetic Radiation
Infrared Radiation
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A wave capable of interacting with electrical charges |
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Electromagnetic Radiation
Ultraviolet Light
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A form of radiation which is not visible to the human eye |
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Electromagnetic Radiation
X-Rays
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An electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light |
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Electromagnetic Radiation
Gamma Rays
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A photon of penetrating electromagnetic radiation (gamma radiation) emitted from an atomic nucleus. |
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Polarized Light |
Light that is reflected or transmitted through certain media so that all vibrations are restricted to a single plane.
Ex: Sunglasses and Chemical Analysis |
