Question

for an emitted wavelength of 500 nanometers and a redshift of 0.4 what will be the observed wavelength g

Answer 1

The observed wavelength is
`\lambda = 700nm` (color - Red)

Step-by-step explanation:

From the question we are told that

The wavelength of the emitter is
`\lambda_ e  = 500 nm  =  500 *10^(-9) \  m`

The redshift is R = 0.4

Generally red shift is mathematically represented as

`R =  ( \lambda -  \lambda_e )/(\lambda_e)`

=>
`0.4  =  ( \lambda -   500 *10^(-9) )/(500 *10^(-9) )`

=>
`\lambda - 500*10^(-9) = 200*10^(-9)`

=>
`\lambda = 700 *10^(-9)`

=>
`\lambda = 700nm`