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Wave Mechanics And Optics Mock Tests

6 questions available

Wave Mechanics And Optics Mock Test 1

Questions: 6

नमूना प्रश्न

GATE Physics
In a diatomic linear chain with alternating masses M and m connected by springs of constant K, the dispersion relation at the Brillouin zone boundary (ka = π) shows:
A a finite frequency gap between acoustic and optical branches
B zero frequency for both branches
C infinite frequency for the optical branch
D a single degenerate branch
GATE Physics
The critical angle for total internal reflection at the interface between glass (n = 1.5) and air is:
A sin⁻¹(2/3) ≈ 41.8°
B sin⁻¹(3/5) ≈ 36.9°
C sin⁻¹(1/2) = 30°
D sin⁻¹(1/3) ≈ 19.5°
GATE Physics
The index of refraction of a material with relative permittivity ε_r = 4 and relative permeability μ_r = 1 is:
A 2
B 4
C 1
D 8
GATE Physics
The numerical aperture (NA) of an optical fiber with core refractive index n₁ = 1.5 and cladding refractive index n₂ = 1.48 is:
A 0.24
B 0.48
C 1.5
D 0.02
GATE Physics
A CO₂ laser operates on the principle of:
A molecular vibrational-rotational transitions
B atomic electronic transitions
C free electron transitions
D nuclear transitions
GATE Physics
The Q-factor of a laser determines:
A the spectral linewidth of the laser
B the power output of the laser
C the beam divergence
D the polarization state

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