Visible spectrum of the light has a wavelength in the range of:A. 1000 to 4000 Ao B. 4000 to 7000 Ao C. 7500 to 12500 Ao D. 12500 to 30000 Ao 42. What is a ‘dolly’?
Note: | The above multiple-choice question is for all general and Competitive Exams in India. |