railway RRB Technician Grade 3 Mock Test 2024 General Science Physics

खालीलपैकी कशात ऑप्टिकल (दृश्य प्रकाश) भिंग नसते?

1
सूक्ष्मदर्शी
2
परिदर्शी
3
दूरदर्शी
4
स्टेथस्कोप
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