Question

Help and explain how to convert it pls

Answer 1

Answer : The correct answer is option (3)
`5.68* 10^(-19)J`

Explanation: Given,

Wavelength = 350 nm =
`350* 10^(-9)m`
`(1nm=10^(-9)m)`

Now we have to determine the energy of photon.

Formula used:

`E=(hc)/(\lambda)`

where,

E = energy of photon

h = Planck's constant =
`6.63* 10^(-34)J.s`

c = speed of light =
`3* 10^(8)m/s`

`\lambda` = wavelength of photon

Now putting all the given values in this formula, we get:

`E=((6.63* 10^(-34)J.s)* (3* 10^(8)m/s))/(350* 10^(-9)m)`

`E=5.68* 10^(-19)J`

Therefore, the energy of photon is,
`5.68* 10^(-19)J`