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: Ray Optics and Optical Instruments
एक उत्तल लेंस को एक द्रव में डुबोया जाता है जिसका अपवर्तनांक लेंस के अपवर्तनांक के बराबर होता है। है, तो इसकी फोकस दूरी क्या है? , A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then what is its focal length?
A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then what is its focal length?
A.
Focal Length will become zero
फोकस दूरी शून्य हो जाएगी
B.
Focal Length will become infinite
फोकल लम्बाई अनंत हो जाएगी
C.
Focal length will reduce, but not become zero
फोकस दूरी कम हो जाएगी, लेकिन शून्य नहीं होगी
D.
Remains unchanged
कुछ नहीं बदला है
Solution
B. Focal Length will become infinite
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