pl3ase explain and answer th Gambrill - umbe-nsen-summer15-physl12 Wave optics A

Question

pl3ase explain and answer

th Gambrill - umbe-nsen-summer15-physl12 Wave optics A wave with a frequency fand wavelength à is traveling along , rainbow: Dispersion by a Diffraction Grating a string at a speed v. Evaluate each of the following state White light containing wavelengths from 13 hm to 757 falls on a grating with 7130 lines/em. How wide is the fi order spectrum on a screen 2.39 m away? nents Choices: Increase, Decrease, Stay the same. . what has happened to the speed of the wave (the Hao Tries 0/7 wavelength is doubled while the frequency is kept con- . What ha to the wavelength if the frequect decreased while keeping the speed costant? What happens to the wavelength if the speed and fre- quebcy are both cut in half? What happens to the frequency if the speed is increased while keeping the wavelength the same? . wbile koeping the wavelength the same?s 2 5.3

Explanation / Answer

Q1. as we know, speed=freqeuncy*wavelength

so if wavelength is doubled and frequency is kept constant, then speed will be doublesd

hence speed increases.

Q2. speed=frequency*wavelength

so if frequency is decreased, while speed is constant, then wavelength will increase to keep the speed constant.

hence wavelength increases.

Q3. speed=frequency*wavelength

if speed and frequency both cut in half, wavelength will remain the same

Q4. speed=frequency*wavelength
if speed is increased with wavelength same, frequency will increase.

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