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Hitung energi satu foton dari sinar ultraviolet ( ...

Hitung energi satu foton dari sinar ultraviolet (begin mathsize 14px style lambda equals 1 blank x blank 10 to the power of negative 8 end exponent end style m) , cahaya tampak (begin mathsize 14px style lambda equals 5 blank x blank 10 to the power of negative 7 end exponent end style m) dan infrared (begin mathsize 14px style lambda equals 1 blank x blank 10 to the power of negative 4 end exponent end style m)! 

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Jawaban:

begin mathsize 14px style E space equals space fraction numerator h c over denominator lambda end fraction end style 

Untuk sinar ultraviolet

begin mathsize 14px style E subscript u v end subscript equals fraction numerator 6.6 space x space 10 to the power of negative 34 end exponent space left parenthesis 3 space cross times space 10 to the power of 8 right parenthesis over denominator 1 space cross times space 10 to the power of negative 8 end exponent end fraction equals space 1.98 space cross times space 10 to the power of negative 17 end exponent space J end style 

Untuk sinar tampak

begin mathsize 14px style E subscript v i s i b l e end subscript equals fraction numerator left parenthesis 6.6 blank x blank 10 to the power of negative 34 end exponent right parenthesis left parenthesis 3 blank x blank 10 to the power of 8 right parenthesis over denominator left parenthesis 5 blank x blank 10 to the power of negative 7 end exponent right parenthesis end fraction equals 3 comma 96 blank x blank 10 to the power of negative 19 end exponent blank J blank end style  

Untuk infrared

begin mathsize 14px style E subscript i n f r a r e d end subscript equals fraction numerator left parenthesis 6.6 blank x blank 10 to the power of negative 34 end exponent right parenthesis left parenthesis 3 blank x blank 10 to the power of 8 right parenthesis over denominator left parenthesis 1 blank x blank 10 to the power of negative 4 end exponent right parenthesis end fraction equals 19 comma 8 blank x blank 10 to the power of negative 22 end exponent blank J end style 

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