What is the wavelength of an X-ray photon with energy 15 keV (1.5×104 eV)? (1 eV = 1.60 × 10−19 joule.)?
What is the wavelength of an X-ray photon with energy 15 keV (1.5×104 eV)? (1 eV = 1.60 × 10−19 joule.)? What's the frequency?
What is the wavelength of an X-ray photon with energy 15 keV (1.5×104 eV)? (1 eV = 1.60 × 10−19 joule.)? What's the frequency?
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If you remember this it is better. 1 Angstrom wavelength = 1 keV. So you have 15 keV. So it will be 1/15 Angstrom. 1 Angstrom is 10^(-8) cm.