Scientific Instruments and their Uses (यन्त्र- कार्य)
Lactometer: It is used to measure purity of milk. (दुधको शुद्धता नाप्ने यन्त्र) Barometer: It is used to measure atmospheric pressure. (वायुमण्डलीय चाप नाप्ने यन्त्र) Photometer: It is used to measure the strength of electromagnetic radiation in the…