If a Quantum of Radiation Has an Energy of 2

question 78

Multiple Choice

If a quantum of radiation has an energy of 2.10 keV,what is its wavelength? (h = 6.63 × 10−³⁴ J⋅s,1 eV = 1.60 × 10−¹⁹ J,c = 3.00 × 10⁸ m/s,and 1 nm = 10−⁹ m)

• A)0.95 nm
• B)197 nm
• C)0.59 nm
• D)1.24 nm
• E)​0.14 nm

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