Midterm Solutions

Midterm Solutions - 3C Prof. Bullock Midterm MT (1-5, 4 pts...

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3C Prof. Bullock Exam A Midterm ID#_____________ 1 MT (1-5, 4 pts each, 20 pts total). For 1-5, write your answer (A-F) IN THE BOXES below. Only answers marked in the appropriate box will be graded. Unreadable letters will be marked wrong. IF YOU LEAVE A BOX BLANK YOU WILL RECEIVE NO CREDIT FOR THE QUESTION. Circled or marked letters below each problem do not count as answers. 1. 2. 3. 4. 5. 1. X-ray waves have _______ and ________ than visible light waves? a. longer wavelengths and propagate faster b. shorter wavelengths and propagate slower c. longer wavelengths and higher frequencies d. shorter wavelengths and lower frequencies e. longer wavelengths and lower frequencies f. shorter wavelengths and higher frequencies f. 2. The vertical height of a particle is given by the expression y = (2.0 m) sin( 4.0 π t + 3/5 π ) where y is in m and t is in s. What is the period of its motion? a. π /4 s b. 0.08 s c. 0.5 s d. 4.0 s e. 4 π s f. 3/5 π s c. ω = 4 π /s = 2 π f => f = 2 Hz and T = 1/f = 0.5 s 3. The particle discussed in the above problem is, in fact, one point along a very long string. The point is located at the position x=2m. Which of the following equations could describe a wave traveling along this string? a. y(x,t) = (2.0m) sin (4.0 π t + 3/5 π x) b. y(x,t) = (2.0m) sin (4.0 π t + 2/5 π x - 2/5 π ) c. y(x,t) = (2.0m) sin (3/5 π x - 4.0 π t + π ) d. y(x,t) = (2.0m) sin (3/5 π x - 4.0 π t ) e. y(x,t) = (2.0m) sin (4.0 π t + 1/5 π x + 1/5 π )
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3C Prof. Bullock Exam A Midterm ID#_____________ 2 e. y(x=2,t) = (2.0m) sin (4 π t + 1/5 π (2) + 1/5 π ) = (2.0m)sin(4 π t + 3/5 π ) 4. Unpolarized light passes through two polaroid sheets. The axis of the first is vertical, and that of the second is at 40.0° off of the vertical. What fraction of the incident light is transmitted? a. not enough information given
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Midterm Solutions - 3C Prof. Bullock Midterm MT (1-5, 4 pts...

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