The number of wavelengths of electromagnetic radiation of wavelength 6000 Å in a path of 2 cm in vacuum is

Options

A. `3.334 xx 10^(4)`
B. `2 xx 10^(4)`
C. `4 xx 10^(4)`
D. `8 xx 10^(4)`

Answer

A

Explanation

No. of waves `= ("Thickness of medium")/("Wavelength")`
`= (2 xx 10^(-2))/(6 xx 10^(-7)) = 3.334 xx 10^(4)`