What will be the energy of a photon which corresponds to the wavelength of 0.50 $˚ A$ ?

3.98 \times 10^{- 15} J

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3 \times 10^{15} J

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3.9 \times 10^{8} J

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3 \times 10^{- 34} J

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Solution

The correct option is A $3.98 \times 10^{- 15} J$
Energy of photon, $E = h c / λ$
where, $h = 6.626 \times 10^{- 34} J s, c = 3 \times 10^{8} m s^{- 1}$
Given $λ = 0.5 \times 10^{- 10} m$
$E = 6.626 \times 10^{- 34} \times 3 \times 10^{8} / (0.5 \times 10^{- 10})$
$E = 39.76 \times 10^{- 16} = 3.98 \times 10^{- 15} J$
option A

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Find energy of each of the photons which
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What will be the energy of a photon which corresponds to the wavelength of 0.50 ˚A?

The correct option is A 3.98×10−15JEnergy of photon, E=hc/λ where, h=6.626×10−34Js,c=3×108ms−1Given λ=0.5×10−10mE=6.626×10−34×3×108/(0.5×10−10)E=39.76×10−16=3.98×10−15Joption A

What will be the energy of a photon which corresponds to the wavelength of 0.50 $˚ A$ ?