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Optics
Prove that the coherence length is related bu bandwidths following equation:-
L=c/∆v= λ²/∆λ
L=c/∆v= λ²/∆λ
Optics
Explain how a tube of glass in a fiber optic cable can keep a beam of light reflecting inside of it, even though the glass is transparent to the light.
Optics
Green light with a wavelength of 580nm goes through a pair of slits, travels at a 30° degree angle from the slits, and ends on a screen. The slits are 0.00001914 m apart. Will the fringe on the screen show constructive or destructive interference? (Tip: Don’t round any of the numbers while doing your calculations)
Optics
A chunk of zircon is sitting in an open container of benzene. A 589nm wavelength of light has gone through the zircon and is emerging into the benzene. It strikes the boundary at an angle of 10.0° from the normal.
How would it be different if the light entered the benzene at a greater angle?
How would it be different if the benzene at an angle greater than the critical angle?
How would it be different if the light entered the benzene at a greater angle?
How would it be different if the benzene at an angle greater than the critical angle?
Optics
A telescope has an objective of focal length 50 cm and eyepiece of focal length 5 cm. The least distant of distinct vision is 25 cm. The telescope is focussed for distinct vision on a scale 200 cm away from the object. Calculate the magnification produced?
1)4
2)-8
3)+8
4)-2
1)4
2)-8
3)+8
4)-2
Optics
The focal lengths of objective lens and eye lens of a Gallelian Telescope are respectively 30 cm and 3.0 cm. Telescope produces virtual, erect image of an object situated far away from it at least distance of distinct vision from the eye lens. In this condition, the Magnifying Power of the Gallelian Telescope should be
1) +11.2
2) -11.2
3) - 8.8
4) + 8.8
1) +11.2
2) -11.2
3) - 8.8
4) + 8.8
Optics
Four lenses a,b,c,d of power +100D , -50D
+20D and 5D . Which lenses will you use to design a compound microscope for best magnification
1) a&c
2)b&d
3)c&d
4a&b
+20D and 5D . Which lenses will you use to design a compound microscope for best magnification
1) a&c
2)b&d
3)c&d
4a&b
Optics
What do you understand by uncertainty principle
Optics
What is the coefficient of viscosity?
Optics
An object is placed 30cm from reflecting surface in front of a block of glass 10 cm thick having it's farther side silvered. The final image is formed 23.2 cm behind the silvered face. The refracting index of glass is :
