Solve any five question from Q.1(A, B, C, D, E)

1(A)
Why the Newton's rings are circular and fringes in wedge shaped film are straight?

3 M

Solve any five question from Q.1(A, B, C, D, E,F,G)

1(A)
Why the Newton's rings are circular and fringes in wedge shaped film are straight?

3 M

1(B)
What is grating and grating element?

3 M

1(B)
What is grating and grating element?

3 M

1(C)
The core diameter of multimode step index fibre is 50μm. The numerical aperture is 0.25, calculate the number of guided modes at an operating wavelength of 0.75μm?

3 M

1(C)
The core diameter of multimode step index fibre is 50μm. The numerical aperture is 0.25. Calculate the number of guided modes at an operating wavelength of 0.75μm?

3 M

1(D)
What is a population inversion state? Explain its significance in the operation of LASER/

3 M

1(D)
What is a population inversion state? Explain its significance in the operation of LASER.

3 M

1(E)
What is diveragence of a vector field? Express it in Cartesian coordinate system.

3 M

1(E)
What is diveragence of a vector field? Express in Cartesian coordinate system.

3 M

1(F)
What do you mean by thin flim? Comment on the colors in thin film is sun light.

3 M

1(F)
What do you mean by thin flim? Comment on the colors in thin film in sun light.

3 M

1(G)
An electron is accelerated through a potential difference of 18kV in color TV cathode ray tube. Calculate the kinetic energy and the speed of th electron.

3 M

1(G)
An electron is accelerated through a potential difference of 18kV in a color TV cathode ray tube. Calculate the kinetic energy and the speed of the electron.

3 M

2(A)
Derive the conditions for maxima and minima due to interference of light transmitted from thin film of uniform thickness.

8 M

2(A)
Derive the conditions for maxima and minima due to interference of light transmitted from thin film of uniform thickness.

8 M

2(B)
Differentiate between step index and graded index fibre An optical fibre has a numerical aperture of 0.20 and a refractive index of cladding is 1.59. Determine the core refractive index and the acceptance angle for the fibre in water which has a refractive index of 1.33.

7 M

2(B)
Differentiate between step index and graded index fibre. An optical fibre has a numerical aperture of 0.20 and a refractive index of cladding is 1.59. Determine the core refractive index and acceptance angle for the fibre in water which has a refractive index 1.33.

7 M

3(A)
Explain the experimental method to determine wavelength of spectral line using diffraction grating. What is the highest order spectrum which can be seen with monochromatic light of wavelength 6000A° by means of a diffraction grating with 5000 lines/cm?

8 M

3(A)
Explain the exprimental method to determine the wavelength of spectral line using diffraction grating. What is the highest order spectrum which can be seen with monochromatic light of wavelength 6000A° by means of a diffraction grating with 5000 lines/cm?

8 M

3(B)
Explain construction and working of He:Ne laser with neat fabel diagram.

7 M

3(B)
Explain construction and working of He:Ne laser with neat label diagram.

7 M

4(A)
Explain Cylindrical co-ordinate system. State the transformation realtion between Cartesian and Cylindrical co-ordinates.

5 M

4(A)
Explain Cylindrical co-ordinate system. State the transformation relation between Cartesian and Cylindrical co-ordinates.

5 M

4(B)
Explain the concept of electrostatic fousing in election optics.

5 M

4(B)
Explain the concept of electrostatic focusing in electron optics.

5 M

4(C)
Two optically plane glass trips of length 10cm are placed one over the other. A thin foil thickness 0.01 mm is introduced between them at one end to form an air film. If the light used has wavelength 5900A° find the spearation between consecutive bright fringes.

5 M

4(C)
Two optically plane glass strips of length 10 cm are placed one over the other. A thin foil of thickness 0.01 mm is introduced beween them at one end to form an ir film . If the light used has wavelength 5900A° find the speration between consecutive bright fringes.

5 M

5(A)
With Newton's ring experiment explain how to determine the refractive index of liquid?

5 M

5(A)
With Newton's ring experiment explain how to determine the refractive index of liquid?

5 M

5(B)
Using Spherical co-ordinate systems calculate the area of radius 2 cm.

5 M

5(B)
Using Spherical co-ordinate systems calculate the area of a disc of radius 2 cm.

5 M

5(C)
What are different techniques to synthesis nanomerical? Explain one of them in detail.

5 M

5(C)
What are different techniques to synthesis nanomaterial? Explain one of them in detail.

5 M

6(A)
With a neat diagram explain construction and working of Scanning electron microscope.

5 M

6(A)
With neta diagram explain construction and working of Scanning electron microscope.

5 M

6(B)
Explain the costruction and reconstruction of hologram with neat diagram.

5 M

6(B)
Explain the construction and reconstruction of hologram with neat diagram.

5 M

6(C)
An electron is accelerated through a potential difference of 5kV and enters a uniform magnetic field of 0.02wb/m

^{2}acting normal to the direction of electron motion. Determine the radius of the path.
5 M

6(C)
An electron is accelerated through a potential difference of 5 kV and enters a uniform magnetic field of 0.02 wb/m

^{2}acting normal to the direction of electron motion. Determine the radius of the path.
5 M

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