Physics MCQ

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