Find the maximum value of resolving power of a grating 3 cm wide having 5000 lines per cm, if the wavelength of light used is 5890 A0. A. 40000 B. 45000 C. 4500 D. 5000

Find the maximum value of resolving power of a grating 3 cm wide having  5000 lines per cm, if the wavelength of light used is 5890 A0. A. 40000  
B. 45000  
C. 4500  
D. 5000
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Answer :

B. 45000
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