Find energy of each of the photons which have wavelength of 0.50 Å.

Solution

Here space straight lambda space equals space 0.50 space straight Å space equals space 0.50 space cross times space 10 to the power of negative 10 end exponent straight m But space straight E space equals space hv space equals space straight h straight c over straight lambda Substituting space the space values comma space straight E space equals space fraction numerator left parenthesis 6.626 space cross times 10 to the power of negative 34 end exponent Js right parenthesis space cross times space left parenthesis 3 space cross times space 10 to the power of 8 space ms to the power of negative 1 end exponent right parenthesis over denominator 0.50 space cross times 10 to the power of negative 10 end exponent straight m end fraction space space space space space equals space 3.98 space cross times space 10 to the power of negative 15 end exponent straight J

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