Question

The value of 1 keV in Joules is:

Options

• \[1.6 \times 10^{-16}\ \text{J}\]

• \[1.6 \times 10^{-10}\ \text{J}\]

• \[1.6 \times 10^{-19}\ \text{J}\]

• \[1.6 \times 10^{-13}\ \text{J}\]

Answer 1

1 keV = 10³ eV. Since 1 eV = 1.6 × 10⁻¹⁹ J, \[1\ \text{keV} = 10^3 \times 1.6 \times 10^{-19}\ \text{J} = 1.6 \times 10^{-16}\ \text{J}\].