Define numerical aperture and angle of acceptance. An optical fiber has a numerical aperture of 0.20 and cladding refractive index of 1.59. Calculate the refractive index of the core material and the acceptance angle of the fibre in water whose refractive index is 1.33.

Discuss applications of lasers in medicine and communication.

भारत के संविधान मे उल्लिखित जीव एवं दैहिक स्वतंत्रता के अधिकार का सविस्तार वर्णन, सर्वोच्च न्यायालय के कुछ महत्वपूर्ण फेसलों का ध्यान में रखते हुए कीजिए।

A vertical single and double slits are illuminated by a point source. Discuss the salient features of their Fraunhofer diffraction patterns. Also, obtain an expression for intensity distribution in case of double slit.

मानव अधिकार को परिभाषित कीजिए। मानव अधिकारों को लागू करने के लिए मानव अधिकार संरक्षण अधिनियम, 1993 के अंतर्गत उपलब्ध तंत्र का वर्णन कीजिए।

The inclined faces of a glass biprism (µ = 1.5) make an angle of 1º with its base. The biprism is illuminated by a sodium lamp (λ = 589 nm) and the eye piece is at a distance of 1 m from the slit. A convex lens inserted between the biprism and the eye piece gives clear images of coherent sources in the focal plane of the eye piece. If the images are 0.4 cm apart in one case and 0.16 cm apart in the second case, calculate the width of interference fringes observed on the screen.

डाइसी के विधिशासन संबंधी विचार की चर्चा कीजिए। भारतीय संविधान में यह सिद्धांत कैसे समाविष्ट किया गया है।

Show that the radius of a dark Newton's ring is directly proportional to the square root of the radius of curvature of the lens used.

Discuss the principle of Michelson interferometer. How is it used to determine the refractive index of a thin plate?

How is image formed on the retina of human eye processed by human brain? Discuss.

Show that superposition of two linearly polarised light waves having different amplitudes and a finite phase difference can be used to produce elliptically plane polarised waves.

A plane e.m. wave is incident normally on an interface. Obtain expressions for reflection and transmission coefficients.

Discuss the importance of hologram in (i) information storage, and (ii) pattern recognition.

चयनात्मक स्टॉक नियंत्रण

Diffraction limits the image forming capability of optical devices'. Discuss the authenticity of this statement for the particular case of a microscope.

हवाई कार्गो टैरिफ

Discuss, with necessary theory, how is interference pattern in Young's double slit experiment modified when a thin glass plate is introduced in the path of one of the interference waves?

Discuss the significance of accommodation and convergence of human eye in respect of perception of light.

विदेशी व्यापार का वातावरण

Write down Maxwell's field equations for free space and obtain expressions for velocity of electromagnetic waves.