Show that a diffraction grating cannot produce a second order maximum for a

given wavelength of light unless the first$-$order maximum is at an angle less than $30\mathrm{.}0$

$$True$$False$$ Neon and Oxygen are noble gases.

$$True$$False$$ The fourth noble gas is krypton.

$$True$$False$$ The heaviest noble gas is radon.

$$True$$False$$ Xenon is the heaviest noble gas. Show that a $30,000-$line$-$per$-$centimeter grating will not produce a maximum for visible

light. What is the longest wavelength for which it does produce a first$-$order maximum? What is the greatest number of lines per centimeter a diffraction grating can have and produce

a complete second$-$order spectrum for visible light knowing that $"$# $=760$nm$?$