Saved Bookmarks
| 1. |
Parameters of blue and red light are 400 nm and 750 nm respectively. Which of the two is of higher energy? |
|
Answer» 400 nm and 750 nm are the wavelengths of blue and red light respectively. Energy of radiation is given by the expression E = hν and the frequency (ν), of radiation is related to the wavelength by the expression. ν = \(\frac{c}{\lambda}\) ∴ E = \(\frac{hc}{\lambda}\) Therefore, Shorter the wavelength, λ, larger the frequency, ν, and higher the energy, E. Thus, Blue light which has shorter λ (400 nm) than red light (750 nm) has higher energy. |
|