Question

What is the frequency of a photon with a wavelength of 159 nm. Report your answers to three significant digits. The frequency is = _________ s-1

Answer 1

Answer:1.89x10^15s₋1

Step-by-step explanation:

the relationship between frequency and wavelength is given as

c= frequency x wavelength

where c = speed of light - 3.8 x 10 ^8 m/s

given here that wavelength = 159 nm

changing to m becomes 1m= 10⁻9nm,

159nm becomes 159 x10-9m

therefore our frequency will now be

frequency = speed of light (c)/ wavelength

= 3.8x1`0^8/159x10^-9 =1.886 x10^15s⁻1 = 1.89 x10^15s⁻1

Answer 2

`Frequency=1.887*10^15s-1`

Step-by-step explanation:

Frequency reffers to the number of occurrences of a repeating event per unit of time. It is measured in units of hertz (Hz), it can also be measured as occurrence of a repeating event per second as well

c is the speed of light having value 3*10^8m/s

Given, Wavelength = 159 nm

But n= 10^-9m

Wavelength=159*10^-9

C=frequency* wavelength

Frequency=c/wavelength

Frequency= 3*10^8/159*10^-9

`Frequency=1.887*10^15s-1`