Upload
oona
View
38
Download
0
Tags:
Embed Size (px)
DESCRIPTION
pgs. 562 – 586 Chapter summary pg. 586. Ch. 15 Lenses and Refraction. Lens A transparent object that refracts light rays Images are formed through the refraction of light Two types: Convex lens Concave lens Converging lens Diverging lens. - PowerPoint PPT Presentation
Citation preview
Ch. 15 Lenses and Refractionpgs. 562 – 586
Chapter summary pg. 586
• Lens– A transparent object that refracts light rays– Images are formed through the refraction
of light– Two types:
Convex lens Concave lensConverging lens Diverging lens
• Focal point for a convex lens is the image distance for an infinite object distance
• Lenses have a focal point on each side of the lens
Convex Lens Images
Convex Lens Images
Convex Lens Images
Convex Lens Images
Convex Lens Images
Convex Lens Images
• A Simple Magnifier enables you to examine small objects by producing an enlarged image
• It increases the angular size of an object– Angular size increases when the object
moves closer– Angular size decreases when the object
moves farther away
Concave Lens Image• Diverging lenses only produce one
kind of image
• Positive magnification = image is upright and virtual• Negative magnification = image is real and inverted
M< 1, image is smallerM = 1, image is the same sizeM > 1, image is larger
An object is placed 30.0 cm in front of a converging lens with a focal length of 10.0 cm. Find the image distance and the magnification. Describe the image.
An object is placed 12.5 cm in front of a diverging lens with a focal length of
10.0 cm. Find the image distance and magnification. Describe the image.