Question

The metal with the highest melting temperature is tungsten which melts at around 3400 K. What is the wavelength of the peak of the blackbody distribution for this temperature. Is this visible, infrared or ultraviolet?

Answer 1

Step-by-step explanation:

It is given that, the metal with the highest melting temperature is tungsten which melts at around 3400 K, T = 3400 K

We need to find the wavelength of the peak of the black body distribution for this temperature. It can be calculated using Wein's displacement law as :

`\lambda* T=k`

k is the constant,
`k=2.89* 10^(-3)\ m.k`

`\lambda=(k)/(T)`

`\lambda=(2.89* 10^(-3)\ m.k)/(3400\ k)`

`\lambda=8.5* 10^(-7)\ m`

or

`\lambda=850\ nm`

The wavelength of infrared is from 700 nm to 1 mm. So, the lies in infrared region of the spectrum. Hence, this is the required solution.