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Sebuah foton dengan frekuensi   menumbuk elektron ...

Sebuah foton dengan frekuensi begin mathsize 14px style 7 comma 5 space straight x space 10 to the power of 11 space MHz end style  menumbuk elektron yang dalam keadaan diam. Foton dihamburkan dengan sudut begin mathsize 14px style 120 degree end style dari arah semula. Jika begin mathsize 14px style h space equals space 6 comma 6 space straight x space 10 to the power of negative 34 end exponent space straight J space straight s end style , panjang gelombang foton setelah menumbuk elektron adalah . . . .

  1. begin mathsize 14px style 4 comma 036 space straight Å end style 

     

  2. Error converting from MathML to accessible text. 

  3. Error converting from MathML to accessible text. 

  4. Error converting from MathML to accessible text. 

  5. Error converting from MathML to accessible text. 

Jawaban:

Panjang gelombang foton:

begin mathsize 14px style lambda apostrophe minus lambda equals fraction numerator h over denominator m c end fraction open parentheses 1 minus cos open parentheses theta close parentheses close parentheses lambda apostrophe equals fraction numerator h over denominator m c end fraction open parentheses 1 minus cos open parentheses theta close parentheses close parentheses plus lambda lambda apostrophe equals fraction numerator h over denominator m c end fraction open parentheses 1 minus cos open parentheses theta close parentheses close parentheses plus c over f lambda apostrophe equals fraction numerator 6 comma 6 cross times 10 to the power of negative 34 end exponent over denominator 9 comma 1 cross times 10 to the power of negative 31 end exponent. space 3 cross times 10 to the power of 8 end fraction open parentheses 1 minus cos open parentheses 120 degree close parentheses close parentheses plus fraction numerator 3 cross times 10 to the power of 8 over denominator 7 comma 5 cross times 10 to the power of 17 end fraction lambda apostrophe equals 0 comma 2417 cross times 10 to the power of negative 11 end exponent open parentheses 1 plus 0 comma 5 close parentheses plus 0 comma 4 cross times 10 to the power of negative 9 end exponent lambda apostrophe equals 0 comma 36 cross times 10 to the power of negative 11 end exponent plus 0 comma 4 cross times 10 to the power of negative 9 end exponent lambda apostrophe equals 0 comma 036 cross times 10 to the power of negative 10 end exponent plus 4 cross times 10 to the power of negative 10 end exponent lambda apostrophe equals 4 comma 036 cross times 10 to the power of negative 10 end exponent space straight m straight lambda apostrophe equals 4 comma 036 space straight Å end style 


Jadi, jawaban yang benar adalah A
 

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