# samp21 - h and then solve for Φ m 10 300 m 10 400 V 820 m...

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SAMPLE PROBLEM (Class 21) ANS There are two sets of data, so two equations can be written, Φ - = Φ - = 2 2 1 1 and , λ hc eV hc eV . These simultaneous equations can be solved to get h and Φ . a) Subtract the two equations to eliminate Φ , and then solve for h to get, h e V V c = - - = × - × × - × - - - ( ) ( . )( . . ) ( . 1 2 1 2 19 8 9 9 1 1 16 10 185 0820 300 10 1 300 10 1 400 10 C V V m/s) m m h = 6.59 ×10 -34 J·s b) Divide one equation by the other to eliminate
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Unformatted text preview: h , and then solve for Φ . m 10 300 m 10 400 )] V 820 . m)( 10 400 ( V 85 . 1 ( m) 10 300 )[( C 10 6 . 1 ( ) ( 9 9 9 9 19 1 2 2 2 1 1-----×-× ×-× × =--= Φ V V e Φ = 3.63 ×10-19 J = 2.27 eV c) eV 2.27 nm eV 1240 so , max max ⋅ = Φ = = Φ hc hc max = 546 nm ¯¯¯¯¯¯¯¯¯¯¯...
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## This note was uploaded on 09/17/2008 for the course PHYS 1200 taught by Professor Stoler during the Spring '06 term at Rensselaer Polytechnic Institute.

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