Question

A geating has 15 cm of surface ruled with
6000 lines /cm . what is resolving power of the
game grating in the first order ?​

Answer 1

Explanation:

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Answer 2

Answer:

The resolving power of the grating surface in the 1st order of diffraction measured is 90,000.

Explanation:

Given,

The ruled distance of the grating surface, L = 15cm

The grating surface with ruled lines, $R_{l}$ = 6000 lines/cm

Order of diffraction, n = 1

The resolving power of the grating surface, $P_{R}$ =?

Now,

• Total number of ruling lines on the grating surface, N = L × $R_{l}$

Here,

• L = The ruled distance of the grating surface
• $R_{l}$ = The ruled lines

Therefore,

• The total number of ruling lines on the grating surface, N = 15 × 6000 = 90,000 lines

As we know,

• The resolving power of the grating surface can be calculated by the equation given below:
• $P_{R}= n\times N$

Here,

• $P_{R}$ = The resolving power of the grating surface
• n = Order of diffraction
• N = The total number of ruling lines

After putting the values in the equation of resolving power, we get:

• $P_{R}= 1\times 90000$
• $P_{R}= 90000$

Hence, the resolving power of the grating surface = 90000.