Optical instruments
Optical instruments is a Science & Technology concept from the MPSC syllabus, tested in 3 past MPSC questions (2015, 2018). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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यादीतील खालील उपकरणांमध्ये आरे व भिंग वापरले जातात. त्यानुसार त्यांचे वर्गीकरण करा. (i) हेडलाइट्स (ii) दूरदर्शी (iii) संयुक्त सूक्ष्मदर्शी (iv) प्रोजेक्शन लॅम्प (v) फ्लडलाइट्स (vi) साधा सूक्ष्मदर्शी In the list of the following instruments, mirrors and lenses are used. Classify them accordingly. (i) Headlights (ii) Telescopes (iii) Compound microscopes (iv) Projection lamps (v) Floodlights (vi) Simple microscopes
Headlights, projection lamps, and floodlights use mirrors (concave/parabolic) to reflect and direct light, whereas telescopes, compound microscopes, and simple microscopes use lenses for refraction and magnification.
1 मिमी × 1 मिमी च्या चौरसाची नक्षी असलेले कार्ड शीट, डोळ्यांच्या अगदी जवळ असलेल्या 9 सेमी नाभीय अंतराच्या बहिर्वर्क भिंगातून 9 सेमी अंतरावरून बघितल्यास, त्या कार्ड शीट वरील चौरस ________ आकाराचे दिसतील. A card sheet divided into squares, each of size 1 mm × 1 mm is being viewed at a distance of 9 cm through a convex lens of focal length 9 cm held close to the eye. The squares on the card sheet will be observed to be of size
When object distance equals focal length of a convex lens, the image is formed at infinity, making the calculation straightforward based on magnification formulas.
दुर्बिनीसारख्या प्रकाशीय उपकरणातील क्षेत्रभिंग व नेत्रभिंग यांच्या जोडणीतून काय आकारते ?
In optical instruments like telescopes, the combination of an objective lens (क्षेत्रभिंग) and an eye-piece (नेत्रभिंग) forms a compound eyepiece or specific optical system configuration.