Single-Slit Diffraction: A beam of light of wavelength 600 nm passes through a slit that is 3.1 × 10-5 m wide, and then goes on to a screen that is 2.2 m from the slit. On the screen, how far is the second dark fringe from the center of the diffraction pattern?

A. 3.9 cm
B. 4.2 cm
C. 6.3 cm
D. 2.1 cm
E. 8.5 cm


Answer: E

Physics & Space Science

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Camera Exposure: A zoom lens for a camera is adjusted to change its focal length from 38 mm to 304 mm. If the same amount of light is to be admitted to the lens in both cases, what is the final f-number if the original f-number was f/2.0?

Fill in the blank(s) with the appropriate word(s).

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A 20.0 cm long organ pipe is filled with air and is open at one end and closed at the other. The velocity of sound in air at 0 is 331 m/s. What is the frequency of the third mode?

A. 2,070 Hz B. 2,190 Hz C. 2,320 Hz D. 2,450 Hz E. 2,680 Hz

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Which of the following is NOT true about streaming media?

A. You need very high bandwidth to stream media. B. Frequently it requires a specific media server to transfer data. C. It consumes RAM even when it is not being played. D. Users can choose the file portion they want to play.

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A spaceship moves at a speed of 0.95c away from the Earth. It shoots a star wars torpedo toward the Earth at a speed of 0.90c relative to the ship. What is the velocity of the torpedo relative to the Earth? (The direction in which the spaceship moves is the positive direction.)

a. ?0.34c b. 0.34c c. 0.060c d. ?0.060c e. 0

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