Engineering Physics-2 Importance

Explain Fraunhofer’s double-slit diffraction experiment
Explain Grating and Diffraction Grating? What is the advantage of increasing the number of lines in the Grating
With a neat energy level diagram describe the construction and working of He-Ne laser
What is the difference between photography and holography?
Numerical Aperture and Acceptance Angle [ Numericals ]
Calculate divergence of the vector Function
Derive Maxwell’s two general equations in integral and differential form and Give their physical significance.
What is Relativity? Explain the Special theory of relativity and the general theory of relativity
Explain Lorenz transformation
Explain top-down and bottom-up approaches to prepare nanomaterials.
Explain construction and Working of Atomic force microscope.

Importance Module wise Arranged

Module 1 :

Fraunhofer Diffraction (T) [V-IMP]
- Explain Fraunhofer’s double-slit diffraction experiment and obtain an expression for resultant intensity of light on the screen and derive the formula for missing orders in the double slit diffraction pattern.
Grating and Diffraction Grating (Num, T)
- Explain Grating and Diffraction Grating? Explain the experimental method to determine the wavelength of the spectral line using diffraction grating? [V-IMP]
- What is the advantage of increasing the number of lines in the Grating
- What is a grating element
- What is the resolving power of Grating
- Numerical also comes on Grating
Rayleigh’s Criterion
- What is Rayleigh’s Criteria of resolution

Module 2: Laser and Fibre Optics

Laser

Differentiate between stimulated and spontaneous emission.
He-Ne Lasers [V-IMP]
- A neat energy level diagram describes the construction and working of the He-Ne laser. What are its merits and demerits?
ND-YAG
- Explain construction and working of Nd: YAG laser.
Application of Lasers [ Holography V/S Photography ] [V-IMP]
- What is the difference between photography and holography? Explain the Holography technique to obtain a 3D image of an object

Fibre Optics

Total Internal Reflection
Numerical Aperture and Acceptance Angle (Theory+Num) [V-IMP]
1. A glass material A with which an optical fibre is made has a refractive index of 1.55. This material is clad with another material whose refractive index is 1.51. The light in the fibre is launched from the air. Calculate the numerical aperture of the fibre [3 Marks ]
2. A bare core optical fibre with no cladding is kept in an air medium and has a fractional index difference of 1.2%. Calculate the acceptance angle of the fibre. [3 Marks ]
3. Derive the formula for numerical aperture of step-index fibre and give its physical significance. The N.A. of optical fibre is 0.5 and the core refractive index is 1.54. Find the refractive index of cladding [ 7 Marks ]
4. Calculate the core radius required for an optical fibre to act as a single-mode fibre if its core refractive index is 1.46 and cladding refractive index is 1.455 and operating wavelength is 1300 nm. [ 7 Marks ]
Explain the term V number.
Communication System in Block Diagram [ Application of Optical fibre ]
1. Draw the block diagram of an optical fibre communication system and explain the function of each block.

Module 3: Electrodynamics

[Similar Type of Numerical comes for 3-5 marks ]

Derive Maxwell two general equations in integral and differential form and Give their physical significance.
Explain the physical significance of divergence and curl of a vector field?
Show that divergence of the curl of a vector is zero.

Module 4: Relativity

What is Relativity? Explain the Special theory of relativity and the general theory of relativity
Explain Lorenz transformation [V-IMP]
Mass Energy Relation
What is time dilation explain in the Details
What is Length contraction observer when v=c?

Module 5: Nanotechnology

Explain top-down and bottom-up approaches to prepare nanomaterials.
Explain construction and Working of Atomic force microscope.
What are nanomaterials? Name the Method for the synthesis of nanoparticles and explain any 2 of them.
Explain with neat diagram principle and working of SEM [ Scanning Electron Microscope ]

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