ch. 15 lenses and refraction

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Ch. 15 Lenses and Refraction pgs. 562 – 586 Chapter summary pg. 586

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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

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$Page 1: Ch. 15 Lenses and Refraction$

Ch. 15 Lenses and Refractionpgs. 562 – 586

Chapter summary pg. 586

$Page 2: Ch. 15 Lenses and Refraction$

• Lens– A transparent object that refracts light rays– Images are formed through the refraction

of light– Two types:

Convex lens Concave lensConverging lens Diverging lens

$Page 3: Ch. 15 Lenses and Refraction$

• 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

$Page 4: Ch. 15 Lenses and Refraction$

Convex Lens Images

$Page 5: Ch. 15 Lenses and Refraction$

Convex Lens Images

$Page 6: Ch. 15 Lenses and Refraction$

Convex Lens Images

$Page 7: Ch. 15 Lenses and Refraction$

Convex Lens Images

$Page 8: Ch. 15 Lenses and Refraction$

Convex Lens Images

$Page 9: Ch. 15 Lenses and Refraction$

Convex Lens Images

$Page 10: Ch. 15 Lenses and Refraction$

• 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

$Page 11: Ch. 15 Lenses and Refraction$

Concave Lens Image• Diverging lenses only produce one

kind of image

$Page 12: Ch. 15 Lenses and Refraction$

$Page 13: Ch. 15 Lenses and Refraction$

$Page 14: Ch. 15 Lenses and Refraction$

• 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

$Page 15: Ch. 15 Lenses and Refraction$

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.

$Page 16: Ch. 15 Lenses and Refraction$

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.

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