Unit I : Lens and Prisms:
2 Marks :
2 Marks :
1.
State Fermat's Principle of Least Time
2. Write any two postulates of geometrical optics
3. Define Focal Length and Power of a lens.
4. What is a narrow angled prism?
5. What is spherical aberration?
6. Define coma.
7. State any two advantages of an eyepiece over a simple lens
8. Define resolving power.
9. What is Rayleigh criterion for resolution?
2. Write any two postulates of geometrical optics
3. Define Focal Length and Power of a lens.
4. What is a narrow angled prism?
5. What is spherical aberration?
6. Define coma.
7. State any two advantages of an eyepiece over a simple lens
8. Define resolving power.
9. What is Rayleigh criterion for resolution?
5 Marks:
1. List the postulates of geometrical optics.
2. Differentiate between thin an thick lenses
3.
Discuss how chromatic aberration is eliminated using an achromatic
doublet.
4. Explain how deviation without dispersion can be achieved using a
combination of prisms.
5. Explain how dispersion without deviation can be achieved using a combination of prisms.
6. Explain the working of Huygens Eyepiece.
6. Explain the working of Huygens Eyepiece.
7.
Explain the working of Ramsden Eyepiece.
8.
Explain the construction and working of constant deviation
spectroscope.
10 Marks:
The above 5 mark questions can also be asked as 10 mark questions.
Depends on your luck!
Unit II : Interference:
2 Marks :
1. What is division of wavefront?
2. What is division of amplitude?
3. What is an air wedge?
4. State the applications of Michelson interferometer.
5. Define interference.
5 & 10 Marks :
1. Explain how colors appear in thin films reflecting white light.
2.
Derive an expression for the fringe width of fringed obtained in air
wedge.
3.
Provide the theory of Newton's rings.
4.
Explain how the wavelength of light emitted from monochromatic light
source can be determined using Michelson interferometer.
5.
Describe the determination of thickness of a thin mica sheet using
Michelson interferometer.
6.
Describe how the Michelson interferometer is used to determine the
wavelength separation of Sodium D lines.
Unit III : Diffraction:
2 Marks:
1. What is Fresnel zone plate?
2. State Fresnel assumptions.
5 Marks:
1.
List the differences between Zone plate and convex lens.
2.
Distinguish between Fresnel and Fraunhofer diffraction.
3. Explain Fresnel diffraction at a single slit.
10 Marks:
1.
Discuss the Fraunhofer diffraction of light through a single slit.
2.Give the theory of plane transmission grating. Describe an experiment to
determine the wavelength of sodium light.
Unit IV : Polarization:
2 Marks:
1. What is a polarizer?
2. State any two applications of polaroid.
3.
Define specific rotatory power/specific rotation.
4. What is double refraction?
5 Marks:
1.
Give the Huygens theory of double refraction in a uniaxial
crystal.
2.
Give the theory of quarter wave plate.
3.
Give the theory of half wave plate.
10 Marks:
1.
Explain Fresnel theory of optical rotation.
2. Explain the production and detection of plane, circularly and
elliptically polarized light.
3. Describe Laurent’s half shade polarimeter and explain how specific
rotary power is determined.
Unit V : Lasers:
2 Marks:
1. Define spontaneous emission.
2. What is stimulated emission?
3. What is optical pumping?
4. List any two applications of Lasers.
5. Write note on holography.
5 Marks:
1.
Write short note population inversion.
2.
Describe the construction and working of a semiconductor laser.
3. Write note on holography.
10 Marks:
1.
Describe the construction and working of He-Ne laser.
2.
Explain how CO2 laser works with suitable diagrams.