Problem 27: What principle is responsible for light spreading as it passes throu

Question

Problem 27: What principle is responsible for light spreading as it passes through a narrow slir A) Refraction B) Polarization C) Diffraction D) Reflection Problem 28: An interference The amplitude each slit to the center of the screen is: pattern is produced by light from a monochromatie source passing through a double slit. of the pattern at the very center is a maximum because the difference in path lengths from A) Zero B) Maximum One wavelength D) One half-wavelength Problem 29: A person stands between two speakers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is 1.65 m from one speaker and 4.95 m from the other. What type of interference does the person perceive? A) Constructive B) Destructive C) Both constructive and destructive ) Neither constructive nor destructive Problem 30: A hammer taps on the end of a 4.oom long metal bar. A mierophone at the other end pieks up two pulses of sound, one that travels through the bar, the other through the air. The pulses are separated by 11.o ms. the speed of sound in the bar? Assume the speed of sound in air is 343 m/s and the pulse from the bar was first What is A) 5174 m/s B) 176 m/s C) 2587 m/s D) 352 m/s Cannot be determined

Explanation / Answer

As per regulation i can provide solution to one questoion at a time and since you have not listed which one you want solved i am providing the solution for first one.

The right answer would be (c) Diffraction.

This phenomenon involves the spreading out of waves past an opening which are in order of the wavelength of the wave. The spreading of these waves into the shadow region can be understood by considering small elements of the wavefront in the slit and treating them like point sources.

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