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Lenses/Mirrors/EM Sp

Lenses, Mirrors, and EM Spectrum

QuestionAnswer
lens Transparent material with a curved surface that reflects light rays
telescopes Use mirrors and lenses to gather more light from far away objects than the eye does
microscopes Use two convex lenses with short focal lengths to magnify small, close objects
cameras Gather and bend light with a lens to form an image on light-sensitive film
Shape of concave lens Thinner in middle than at edges
How does a concave lens cause the light to bend? They bend away from each other toward the edges of the lens.
Type of image formed by concave lens Virtual images
Shape of convex lens Thicker in the middle than at the edges
How does a convex lens cause the light to bend? Light waves refract (bend) toward the center and meet at a focal point.
Type of image formed by convex lens Real or virtual
Focal length Distance from lens to where light comes into focus
Two main types of lenses Convex and concave
Plane mirror Flat, smooth mirror in which an image appears upright
Concave mirror Mirror surface is curved inward; light rays come together when reflected
Convex mirror Mirror curved outward; light rays spread out when reflected; shows virtual images
Another name for convex lens converging
Another name for concave lens diverging
Focal length Distance from the lens to where the light comes into focus
Which type of lens refracts light? Both concave and convex
Long wavelength = Low energy (low frequency)
Short wavelength = High energy (high frequency)
Order of EM spectrum from lowest energy to highest energy Radio, microwave, infrared, visible light, ultraviolet, X-ray, gamma ray (“Ralph medaled in vaulting under x-treme gravity.)
The EM spectrum is an arrangement of …. Radiation arranged by wavelengths
Part of the EM spectrum with the least amount of energy Radio waves
Part of the EM spectrum with the most amount of energy Gamma rays
What causes us to be able to see objects? Light reflecting off of them
What type(s) of electromagnetic wave(s) are created by the sun? All of them
Created by: Nisey1996
 

 



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