Question

if there are 10,000lines per inch in a plane diffracting grating,then the grating element is (a) 0.001 cm b. 0.0001 cm c. 0.000254 cm d. 0.254 cm ​

Answer 1

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Answer 2

Given:

Number of lines in plane diffracting grating per inch = 10,000lines

To find:

Grating element

Solution:

Formula used to find the grating element is as follows-

             $Grating element = \frac{1}{no. of lines}$

here,

        number of lines per inch = 10,000lines

by putting values, grating elements will be,

           $Grating element = \frac{1}{10,000}$

          Grating element = 10⁻⁴cm

      or, Grating element = 0.0001 cm

Therefore, Grating element is found to be 0.0001cm.

So, Option(b) is correct.