UNIT-I
Q1.a)What is Fermat's principle?Prove the laws of refraction of light using Fermat's principle.
b)Define Principal and Nodal points for a coaxial system of lenses with ray diagram.Two thin convex lenses of focal length 30 cm and 10 cm respectively are separeted by a distance of 20 cm.Locate the positions of cardinal points for this lens system.
Q2.a)What is the difference between spherical and chromatic aberration?Derive the formula for minimum spherical aberration of two thin lenses separated by a distance.
b)Discuss the working of Ramsden's eye piece.Find the position of cardinal points for this eye piece.Why it is called positive eye piece?
UNIT-II
Q3.a)Desribe the formation of interfernce fringes in Lloyd's mirror.How achromatic fringes are obtained in case of lloyd's mirror.
b)Explain the effect of introducing a thin transparent material in the path of one of the interfering beams in biprism experiment.
Q4.a)Describe the working of Michelson interferometer.Describe the method
for the measurement of wavelength of a monochromatic light with the help of Michelson interferometer.
b)Find the condition of maxima and minima in case of interfernce of light by a wedge shaped film.
UNIT-III
Q5.a)Discuss the Fresnel's theory of half period zones.Explain the rectilinear propagation of light on the basis of the theory.
b)What is a zone plate?Compare a zone plate with a convex lens.
Q6.Discuss Fraunhofer diffraction due to a single slit and explain its diffraction pattern.What is the basic difference between Fresnel's and Fraunhofer's class od diffraction?
UNIT-IV
Q7.a)What is Brewster's angle?Explain Huygen's theory of double refraction in uniaxial crystal.
b)How a polarized light is produced and detected?Discuss a method for production and detection of polarized light.
Q8.What is quarter wave plate?Explain how it is used for analysis of polarized light.Differentiate between quarter wave and half shade polarimeter.
UNIT-V
Q9.a)What is stimulated emmision?Find the relation between Einstein's A and B coefficients.
b)Draw a neat diagram of He-Ne laser and explain its working.
Q10.a)What do you understand by population inversion?How it is achieved in case od Ruby laser?
b)What is coherence length and coherence time?
Q1.a)What is Fermat's principle?Prove the laws of refraction of light using Fermat's principle.
b)Define Principal and Nodal points for a coaxial system of lenses with ray diagram.Two thin convex lenses of focal length 30 cm and 10 cm respectively are separeted by a distance of 20 cm.Locate the positions of cardinal points for this lens system.
Q2.a)What is the difference between spherical and chromatic aberration?Derive the formula for minimum spherical aberration of two thin lenses separated by a distance.
b)Discuss the working of Ramsden's eye piece.Find the position of cardinal points for this eye piece.Why it is called positive eye piece?
UNIT-II
Q3.a)Desribe the formation of interfernce fringes in Lloyd's mirror.How achromatic fringes are obtained in case of lloyd's mirror.
b)Explain the effect of introducing a thin transparent material in the path of one of the interfering beams in biprism experiment.
Q4.a)Describe the working of Michelson interferometer.Describe the method
for the measurement of wavelength of a monochromatic light with the help of Michelson interferometer.
b)Find the condition of maxima and minima in case of interfernce of light by a wedge shaped film.
UNIT-III
Q5.a)Discuss the Fresnel's theory of half period zones.Explain the rectilinear propagation of light on the basis of the theory.
b)What is a zone plate?Compare a zone plate with a convex lens.
Q6.Discuss Fraunhofer diffraction due to a single slit and explain its diffraction pattern.What is the basic difference between Fresnel's and Fraunhofer's class od diffraction?
UNIT-IV
Q7.a)What is Brewster's angle?Explain Huygen's theory of double refraction in uniaxial crystal.
b)How a polarized light is produced and detected?Discuss a method for production and detection of polarized light.
Q8.What is quarter wave plate?Explain how it is used for analysis of polarized light.Differentiate between quarter wave and half shade polarimeter.
UNIT-V
Q9.a)What is stimulated emmision?Find the relation between Einstein's A and B coefficients.
b)Draw a neat diagram of He-Ne laser and explain its working.
Q10.a)What do you understand by population inversion?How it is achieved in case od Ruby laser?
b)What is coherence length and coherence time?
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