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Author Question: Light from a laser forms a 1.31-mm diameter spot on a wall. If the light intensity in the spot is ... (Read 73 times)

yoooooman

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on: Oct 11, 2019

Question 1

What are the wavelength (in meters) and frequency (in hertz) of a wave whose displacement is given by the equation y = 0.5 sin(0.20x + 120t), where x and y are in meters and t is in seconds?
◦ 10 m, 0.50 Hz
◦ 31 m, 19 Hz
◦ 19 m, 120 Hz
◦ 5.0 m, 10 Hz
◦ 0.20 m, 120 Hz

Question 2

Light from a laser forms a 1.31-mm diameter spot on a wall. If the light intensity in the spot is what is the power output of the laser? Assume that all the light emitted by the laser hits the spot.
◦ 13.2 mW
◦ 21.3 mW
◦ 17.9 mW
◦ 24.7 mW
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Marked as best answer by yoooooman on Oct 11, 2019

recede

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Reply #1 on: Oct 11, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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yoooooman

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Reply #2 on: Oct 11, 2019
Excellent


recede

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Reply #3 on: Oct 11, 2019
Great! Please up vote :D


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