Spherical Mirrors — Homi Bhabha Exam Physics MCQs with Solutions
Free Homi Bhabha Exam Physics Spherical Mirrors MCQs with step-by-step solutions (5 questions). Part of Light & Optics. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Spherical Mirrors · medium · theory
A concave mirror is used as a shaving/make-up mirror because, when the face is close to it, it forms an image that is:
A. real and inverted
B. erect and magnified ✓ Correct
C. inverted and diminished
D. the same size
Solution: For an object within its focus, a concave mirror gives an erect, magnified (virtual) image.
Q2 — Spherical Mirrors · medium · theory
A convex mirror is preferred as a rear-view mirror in vehicles because it:
A. gives an inverted image
B. shows a narrow field of view
C. gives a magnified image
D. gives an erect, diminished image and a wider field of view ✓ Correct
Solution: A convex mirror always forms an erect, smaller image and covers a wider area behind the vehicle.
Q3 — Spherical Mirrors · medium · numerical
The focal length of a spherical mirror of radius of curvature 20 cm is:
A. 5 cm
B. 40 cm
C. 10 cm ✓ Correct
D. 20 cm
Solution: Focal length $= \dfrac{R}{2} = \dfrac{20}{2} = 10$ cm.
Q4 — Spherical Mirrors · hard · numerical
A concave mirror has a focal length of 15 cm. Its radius of curvature is:
A. 7.5 cm
B. 30 cm ✓ Correct
C. 45 cm
D. 15 cm
Solution: Radius of curvature $R = 2f = 2 \times 15 = 30$ cm.
Q5 — Spherical Mirrors · hard · theory
When an object is placed beyond the centre of curvature of a concave mirror, the image formed is:
A. real, inverted and diminished ✓ Correct
B. virtual and diminished
C. real, erect and magnified
D. virtual, erect and magnified
Solution: For an object beyond C, a concave mirror forms a real, inverted, diminished image between F and C.