Diffraction limits resolution because: MCQ with Answer and Explanation

Diffraction limits resolution because:
A. Lenses absorb light
B. Mirrors reflect poorly
C. Light bends around edges, blurring images
D. Atmosphere distorts
Answer: Option C
Solution (By JKSSB Mock Tests)
Diffraction spreads light through apertures, creating Airy patterns instead of points. Fundamental limit: θ_min ≈ 1.22λ/D (Rayleigh criterion). Memory tip: 'Diffraction limit: smaller λ or larger aperture ⇒ better resolution'. Wave optics concept frequently tested in competitive exams.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1
The unit of electric current in CGS system is
A. Statampere
B. Coulomb
C. Ampere
D. Abcoulomb

Correct Answer: Option A


Explanation:
CGS electrostatic unit of current is statampere. EMU is abampere. SI is ampere.

This question belongs to: Science Physics
Question #2
Rainbow formation involves:
A. Refraction only
B. Diffraction
C. Reflection only
D. Dispersion and total internal reflection

Correct Answer: Option D


Explanation:
Rainbow: sunlight enters raindrop (refraction + dispersion), reflects internally (TIR), exits with further refraction. Primary rainbow: one TIR; secondary: two TIRs. Memory tip: 'Rainbow = refraction + dispersion + TIR in water droplets'. Application question testing atmospheric optics, frequently appearing in competitive exams.

This question belongs to: Science Physics
Question #3
A pulley system has 4 pulleys. Its velocity ratio (number of supporting ropes) is
A. 8
B. 4
C. 1
D. 2

Correct Answer: Option B


Explanation:
For ideal block and tackle with n movable pulleys, VR = n = 4.

This question belongs to: Science Physics