Question

If a wave has frequency $f={10}^{14}Hz$ and speed v = 100 m/s, what is its wavelength?

• A. ${10}^{-16}m$
• B. ${10}^{-12}m$
• C. ${10}^{10}m$
• D. ${10}^{12}m$
• E. ${10}^{16}m$

Answer 1

The correct option is B ${10}^{-12}m$

Given : $f={10}^{14}$ Hz $v=100$ m/s

Thus wavelength of the wave $\lambda =\frac{v}{f}=\frac{100}{{10}^{14}}={10}^{-12}$ m