Question

From the list below, correctly choose the variables that can be used to increase the resolution of a grating.

A. Match the blaze angle to the entrance slit width for maximum throughput.

B. Minimize the blaze angle to reduce diffraction effects.

C. Increase the groove density (finer ruled grating).

D. Increase the total number of grooves by increasing the grating length.

E. Increase the size of the individual grooves with a constant grating length.

Answer 1

the groove density is the number of lines per mm

so if the groove density is increases the reciprocal dispersion is increases

so the answer is

C) increase the groove density.