Assignment $8$ Electromagnetic Waves

Your work must be clear to read. Show all steps in GRASS format. GRASS means

given$/$required$/$analysis$/$solution$/$statement$.$

Problem: A student measuring the wavelength produced by a lamp. The light is directed through two

slits with a separation of $0\mathrm{.}01mm.$ An interference pattern was created on the screen $8\mathrm{.}0m$ away.

The student found that the distance between the $1^{st}$ and $4^{th}$ consecutive dark lines was $1\mathrm{.}0cm.$ What

was the wavelength of the light emitted by the lamp?