Physics - Geometrical Optics Question with Solution | TestHub
PhysicsGeometrical OpticsReflection at plane surfaceMedium2 minQB
PhysicsMediumnumerical
A fluorescent lamp of length 1 m is placed horizontally at a depth of 1.2 m below a ceiling. A plane mirror of length 0.6 m is placed below the lamp parallel to and symmetric to the lamp at a distance 2.4 m from it as shown in figure. Find the length in meters (distance between the extreme points of the visible region along x-axis) of the reflected patch of light on the ceiling.
Answer:
3.00
Solution:
Extreme rays from the lamp's ends reflect at the mirror's edges up to the ceiling.
Similar triangles with the 1.2 m and 2.4 m distances give a patch length of 3 m.
Answer: 3.00
Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Reflection at plane surface
⏱ 2mℹ️ Source: QB
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