Question

determine the energy for a x-ray in joules.
a 1.989 x 10^-17
b 1.989 x 10^-15
c 1.989 x 10^-37
d 1.989 x 10^17

Explanation:

Step1: Recall the formula for energy of a photon

The energy of a photon is given by \(E = hc/\lambda\), where \(h = 6.626\times10^{-34}\space J\cdot s\) (Planck's constant), \(c= 3\times 10^{8}\space m/s\) (speed of light).

Step2: Determine the wavelength of X - Ray

From the given wavelength scale, the wavelength of X - Ray \(\lambda= 10^{-10}\space m\)

Step3: Calculate the energy

Substitute the values into the formula:

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Answer:

A. \(1.989\times 10^{-17}\)