A laser pointer emits a deep red beam with a wavelength of 670 nm. What is the frequency of the deep red beam? A) 894 Hz B) 8.94 × 10¹⁴ Hz C) 448 Hz D) 4.48 × 10¹⁴ Hz E) 6.70 × 10^-9 Hz

Question

Quizplus · Accepted Answer

The frequency of a wave can be calculated using the equation f=c/λ, where c is the speed of light and λ is the wavelength. Substituting the values given, we get f=(3×10^8 m/s)/(670×10^-9 m)=4.48×10^14 Hz, which is answer choice D.

A Laser Pointer Emits a Deep Red Beam with a Wavelength