The distance between the ruled lines on a diffraction grating is $1900 \mathrm {~nm}$. The grating is illuminated at normal incidence with a parallel beam of white light in the $400 \mathrm {~nm}$ to $700 \mathrm {~nm}$ wavelength band. What is the angular width of the gap between the first order spectrum and the second order spectrum?
A) $6.3 ^ { \circ }$
B) $4.3 ^ { \circ }$
C) $5.3 ^ { \circ }$
D) $2.3 ^ { \circ }$
E) $3.3 ^ { \circ }$

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The Answer of The distance between the ruled lines on a diffraction grating is $1900 \mathrm {~nm}$. The grating is illuminated at normal incidence with a parallel beam of white light in the $400 \mathrm {~nm}$ to $700 \mathrm {~nm}$ wavelength band. What is the angular width of the gap between the first order spectrum and the second order spectrum?
A) $6.3 ^ { \circ }$
B) $4.3 ^ { \circ }$
C) $5.3 ^ { \circ }$
D) $2.3 ^ { \circ }$
E) $3.3 ^ { \circ }$

The Distance Between the Ruled Lines on a Diffraction Grating 1900 nm1900 \mathrm {~nm}1900 nm

The Distance Between the Ruled Lines on a Diffraction Grating $1900 \mathrm {~nm}$