4 questions from past BPSC papers, each with the correct answer and an
explanation of why. Free to read — no signup.
How often it has appeared
Paper
67
68
70
71
70Re
Total
Light & Optics
2
1
3
1
3
10
Questions
63rd Pre · 2018
A swimmer underwater appears taller because of:
Reflection
Refraction
Diffraction
Polarization
67th Pre · 2022
Concave lens is used to correct which eye defect?
Myopia
Hypermetropia
Astigmatism
Presbyopia
Why: Myopia (short-sight) corrected by concave lens.
69th Pre · 2023
Diamond sparkles because of:
Refraction
Total Internal Reflection
Dispersion
Polarization
Why: High refractive index n=2.42 causes TIR at all internal faces.
64th Pre · 2018
When white light passes through a prism, the colour that bends most is:
Red
Yellow
Green
Violet
Why: Shorter wavelength → more bending. VIBGYOR — V at top.
Study these topics in order, and remember them
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