Question

A visible light electromagnetic wave has a wavelength of 625 nm. To convert 625 nm to meters, remember 625 nm is 6.25 x 10−7 m. What is the frequency of the wave? Remember the unit is Hz.
I do not know how to do this. Can some show me how it is done please

Answer 1

Answer:

when an unknown wavelength of light was shined on a metallic surface, the electron is ejected with a velocity of

1.0 \times 10 {}^6ms {}^ - 11.0×106ms−1

If the threshold energy (work function) of the electron is

2.8575 \times 10 {}^ - 18 \: joules2.8575×10−18joules

the wavelength of light in nm is :