Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-07: Physics›Light: Nature of light, reflection of light, laws of reflection, reflection from plane and curved surface, image formation by plane, convex and concave mirror, relation between focal length and radius of curvature, determination of focal length of concave mirror by single pin method, relation between u, v, f (numerical examples)›The number of images of an object placed between two mirrors inclined

The number of images of an object placed between two mirrors inclined at an angle of 45° are:

20183M#mppsc-forest#pyq#mcq#2018
A.5
B.6
C.7Correct
D.8
Explanation & Solution

Correct Answer: (C) 7

The number of images n formed by two mirrors inclined at angle θ is given by 360/θ if 360/θ is even, or checked when odd. Here θ = 45°, so 360/45 = 8 (which is even), meaning the number of images formed is 8 - 1 = 7.

हिंदी में प्रश्न एवं आदर्श उत्तर

एक वस्तु 45° पर झुके हुए दो दर्पणों के बीच में रखी है, इस वस्तु के कितने प्रतिबिंब होगंे:

A.5
B.6
C.7सही
D.8

सही उत्तर: (C) 7

दो समतल दर्पणों के बीच 45° का कोण होने पर बनने वाले प्रतिबिंबों की संख्या का सूत्र n = (360/θ) - 1 होता है। अतः 360/45 = 8, और सम होने के कारण प्रतिबिंबों की कुल संख्या 8 - 1 = 7 होगी।

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