Exam_3_-_Solutions

# Exam_3_-_Solutions - LOS MEDANOS COLLEGE PHYS 42 Spring...

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LOS MEDANOS COLLEGE PHYS 42 Spring 2010 Exam 3 Conceptual: 1. A ray of light strikes a thick sheet of glass (n=1.5) at an angle of 25° with the normal. Find the angle of the ray reflected off the glass surface with respect to the normal. (a) 56° (b) 46° (c) 39° ©25° (e) 65° 2. A light ray in air enters and passes through a block of glass. What can be stated with regard to its speed after it emerges from the block? (a) Speed is less than when in glass. (b) Speed is less than before it entered glass. (c) Speed is same as that in glass. ((cmSpeed is same as that before it entered glass. 3. A mirror is an image forming device based on {"*£, T 1 to Y*\ . 4. A lens is a transparent image forming device based on f Q, V fqjC.'Vc 0 P\ 5. Illustrate a concave mirror below and label all the relevant information (including the placement of the eye and light). «r curv<dure F= •f * -focal The speed of light in vacuum is about: (a) HOOft/s 93 x 10 6 mi/s (b) 6x 10 23 m/s cl)3 x 10 10 cm/s (d) 186,000 mph

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LOS MEDANOS COLLEGE >o 1 O.-H6n.S PHYS 42 Spring 2010 Exam 3 7. The relation n\sin0\ = «2 sin which applies as a ray of light strikes an interface between two media, is known as: § Gauss' law Snail's law (c) Faraday's law (d)
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Exam_3_-_Solutions - LOS MEDANOS COLLEGE PHYS 42 Spring...

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