# Refraction of Light

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## Refraction of Light

Lecture number:
23
Pages:
4
Type:
Lecture Note
School:
The University of Vermont
Course:
Phys 012 - Elementary Physics
Edition:
1
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Unformatted text preview:

Lecture 23 Outline of Last Lecture I. Curved Mirrors a. When light passes through the center of curvature C, it will reflect back along the same path it took to the mirror, but in the opposite direction. b. When light passes through the focal point F, it will reflect back parallel to the principal axis. c. When light reflects off of the point where the mirror and the principal axis meet, it reflects back at the same angle θ relative to the principal axis as when it was it was first incident upon the mirror. d. Mirror equation: 1/f = 1/ do + 1/di i. f = distance along principal axis from mirror to focal point F 1. f = ½ radius (distance along principal axis to center of curvature) 2. object at focal point will appear infinitely far away ii. do = distance along principal axis from mirror to object iii. di = distance along principal axis from mirror to image e. ho/do = - hi/di i. ho = height of object ii. hi = height of image f. magnification = m = hi/ho = -di/do II. Problem: Concave Mirrors a. If f = 10 cm and do = 25 cm, find di and m. i. 1/di = 1/f – 1/do = 1/10 – 1/25 = 3/50 cm-1 ii. di = 1/(3/50) = 50/3 cm iii. m = - di/do = -(50/3)/25 = -2/3 x iv. The image will be real. b. If f = 10 cm and do = 5 cm, find di and m. Physics 012 1st Edition

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