# force_on_a_disk - Force we can use the following formula...

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Force on a Disk Given: F i n d : cm r 3 ? Force W P 300 cm R 5 nm 514 % 8 ref % 52 trans A solid disk of radius r = 3 cm is illuminated by a 300 W laser beam propagating to the right and centered on the disk. The beam has a circular cross section of radius R = 5 cm, and the laser wavelength is 514 nm. You may assume that the intensity of the laser is uniform across the beam diameter. The material of the disk is such that, at this wavelength, it reflects 8% of the incident light, transmits 52%, and absorbs the rest. What is the net force on the disk due to the light pressure? Solutions a.) To find

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Unformatted text preview: Force we can use the following formula: Area) Pressure)( ( Force c I Pressure 2 % Area P I R ofP 2 Area) Pressure)( ( r c I Force trans ref P P ref trans ref ofP 100 2 ) ( 100 % i.e. Power times absorb+2ref 2 2 2 2 2 100 100 R c trans ref P r r c R trans ref P r c I Force 2 2 100 cR P r trans ref Force...
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force_on_a_disk - Force we can use the following formula...

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