15 questions
If medium on both sides of optical system is same ,the principle and nodal points.....
Operater
Same
Coinside
Angle
The idea of cardinal point was put forth by.....
Watson
Thomas
Guass
Nothing anyone
The equivalent focal length of two thin co axial lenses of focal length f1 and f2 separetly by finite distance 'd' in air is......
f =f1f2/f1+f2-d
F =f1f3/f1+f3-d
If P1,P2 are the principle points and N1 and N2 are the nodal points, then.....
P1N1×P2N2
P1N1=P2N2
P1N1√P2N2
All of the above
An optical system has ......numbers of cardinal points .
4
2
8
6
Michelsons interferometer ,the order of the circular fringes at the centre of pattern is......
Lowest
Medium
Highest
Option 1and 2
In fabry - perot Interferometer ,the visibility of the fringes depends on......
Reflection
Refraction
Refractometer
Reflecting power
In F.P interferometer ,the sharpness of fringes increase as reflectivity R.......
Increase
Decrease
Remains same
All of the above
The fringe width in F.P interferometer is ...... than in Michelson interferometer.
Greater
Much more greater
Smaller
Much more smaller
The sharpness of fringes in Michelson interferometer compared to F.P interferometer is...
Small
Large
Remains same
Very small
Zone plate behave like a .....
Concave lens
Convex lens
Reflected
Nothing anyone
In S zone plate, the area of zones.....
Not a same
Is the same for all
Constant
Option A
In case of Fresnel diffraction at straight edge ,in the region of light away from the edge of the shadow ,the band width....
Increase
Constant
Decrease
Very increase
Calcite is......crystal.
Positive
Negative
Constant
All of these
A half wave plate produces a phase difference..... between O - rays and E-rays
π/2
π/3
π
π/-2