Question

A light wave travels at a speed of 3.0 × 10§ meters/second. If the wavelength is 7.0 × 10È¥ meters, what is the frequency of the wave?

Answer 1

here we have to apply this formula:
\[\Large \lambda \nu = c\]
where \nu is the frequency

Answer 2

Any wave's speed, frequency, and wavelength are related by the following equation.
speed=frequency*wavelength
This relation is intuitive if you imagine what is really happening when a wave is traveling. Imagine a water wave that has a wavelength of one meter and a frequency of one cycle per second. One full wave cycle would move past a set point every second, and the length of that wave cycle is one meter. This means that the wave would advance one meter per second, or speed=freq*wavelength.

Answer 3

so:
\[\Large \nu = \frac{c}{\lambda } = ...?\]