Question

Using the equation A=c/f to calculate the wavelength of ultraviolet light whose frequency is 2x10^15hz.A.1.5x10^7mB.1.5x10^-7HzC.1.5nmD.1.5x10^-7m

Answer 1

ANSWER

D. 1.5 x 10⁻⁷ m

EXPLANATION

In the equation, c is the speed of light - which is 3x10⁸ m/s, and f is the frequency - which for this ultraviolet light is 2x10¹⁵ hz. Then, its wavelength is:

$\lambda=\frac{3\cdot10^8m/s}{2\cdot10^{15}1/s}=1.5\cdot10^{-7}m$

Therefore, answer is option D. 1.5 x10⁻⁷ m