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CBSE - Class 12 Physics Wave Optics Worksheet
If Young's double slits experiment performed in water instead of air,then the fringe width
Remains same
b.Decrease
c.Increase
d.Nothing can be said
In Fresnel's bi prism two coherent sources are obtained by
By division of wavefront
b.By division of amplitude
c.By both type
d.By none of these
In Young's double slits experiment for which colour the fringe width is minimum
Red
b.Green
c.Violet
d.Yellow
By what method the two coherent sources are produced in Fresnel's bi prism
Reflection
b.Refraction
c.Diffraction
d.Total internal reflection
Phase difference between two points on a wavefront separated by λ is
0
b.π
c.π/2
d.2π
Who gives the wave theory of light?
Huygens
b.Fresnel
c.Newton
d.Maxwell
In a monochromatic sinusoidal wave coherence time is
0
b.Finite
c.Infinite
d.None of the above
What is the type of interference fringes in Fresnel's bi prism experiment
Straight line
b.Circular
c.Elliptical
d.Hyperbolic
The wavefront from a distant source is
Spherical
b.Cylindrical
c.Plane
d.None of the above
In a monochromatic sinusoidal wave, coherence time is
Zero
b.Finite
c.Infinite
d.None of the above
In a monochromatic sinusoidal wave, coherence time is
Zero
b.Finite
c.Infinite
d.None of the above
Two light sources are said to be coherent if they
Are of the same frequency
b.Are of the same frequency and maintain a constant phase difference
c.Are of the same amplitude and maintain a constant phase difference
d.Are of the same frequency and amplitude
In a monochromatic sinusoidal wave, coherence time is
Zero
b.Finite
c.Infinite
d.None of the above
In a monochromatic sinusoidal wave, coherence time is
Zero
b.Finite
c.Infinite
d.None of the above
Worksheet Answers
Solution:
Fringe width W=Dλ/d
In water D and d remains same but wavelength changes
So in water W'=W/μ
μ refractive index
Solution:
W ∝λ
Solution:
On a wavefront all points are in same phase
Solution:
For large r , curvature is minimum
