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Light and Lenses
Contrast ways in which light rays are bent by concave and convex lenses.
15
Science
5th Grade
11/25/2011

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Cards

Term
Reflection
Definition
The bouncing of light or wave from a surface.
Term
Refraction
Definition
The bending of light or waves as it passes from one material to another.
Term
Electromagnetic Radiation
Definition
Energy that travels through space in the form of light and other types of energy.
Term
How does light travel?
Definition
In a straight line in waves.
Term
Spectrum
Definition
Range of electromagnetic radiation that travels in waves with many frequencies and wavelengths. Visible light makes up only a small part of the spectrum.
Term
What must happen for you to see an object?
Definition
The object must give off (reflect) wavelengths of visible light, and the light must enter your eye.
Term
Prism
Definition
A transparent object that separates (refracts) white light into different wavelengths which causes different colors to separate from each other.
Term
Absorbed Light (Absorbtion)
Definition
Light is taken in by an object. When light is absorbed the light energy is transformed into thermal energy.
Term
Transparent
Definition
A material that allows light energy to pass through.
Term
Farsighted
Definition
A farsighted person can focus well on objects at a distance, but close-up objects are blurred. Convex lens bend light rays inward, so they focus on the retina instead of behind it.
Term
Nearsighted
Definition
A nearsighted person can focus well on objects close-up but distant objects are blurred. Concave lenses are thinner in the middle than around the edges. They bend light rays outward before they reach the eye so the rays focus on the retina instead of in front of it.
Term
Convex Lens
Definition
A lens that is thickest in the middle and bends light rays toward one another to make objects look larger.
Term
Concave Lenses
Definition
A lens that is thinner in the middle than the edges. It bends light rays to spread out and makes an object look smaller.
Term
Which type of lens allows light to enter the human eye? Convex or Concave
Definition
Convex Lens
Term
Opaque
Definition
A material that does not allow light to pass through.
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