STUPIDSID
Answer any one question from Q1 & Q2
1 (a)
Prove that in Newton?s Ring by reflected light the diameter of bright ring are proportional to the square root of the odd natural number.
6 M
1 (b)
Explain any one application of Ultrasonic Waves.
3 M
1 (c)
The average reverberation time of a hall is 1.5 sec. and the area of the interior surface is 3340m2. If the volume of the hall is 13000m3. Find the absorption coefficient.
3 M
2 (a)
Explain how piezoelectric effect can be used for generating Ultrasonic Waves?
6 M
2 (b)
Define fringe width for wedge shaped film, obtain an expression for it.
3 M
2 (c)
Find the half angular width of the central maxima in the
fraunhofer diffraction pattern of slit having width 10 ?10-5 cm. When illumininated by light having wave length 5000 A?
3 M
Answer any one question from Q3 & Q4
3 (a)
State the Phenomena of Double Refraction. Hence explain Huygen?s Wave Theory of Double Refraction.
6 M
3 (b)
Draw energy band picture for P-N junction in case of (i) Zero Bias (ii) Forward Bias (iii) Reverse Bias.
3 M
3 (c)
A silver wire is in the form of a ribbon 0.5cm wide and
0.1 mm thick. When a current of 2A passes through the ribbon perpendicular to 0.8 Tesla Magnetic Field. Calculate the Hall Voltage produced.
(Given : Density of Silver = 10.5 gm/cc, Atomic Weight of Silver = 108, Avogadros No. 6.02 ? 1023 gm/mole)
(Given : Density of Silver = 10.5 gm/cc, Atomic Weight of Silver = 108, Avogadros No. 6.02 ? 1023 gm/mole)
3 M
4 (a)
Derive an expression for Conductivity in Semiconductor.
6 M
4 (b)
Explain any one application of Laser.
3 M
4 (c)
How should the Polarizer and Analyzer be oriented to reduce intensity of beam to (i) 50% (ii) 0.25 of its original intensity ?
3 M
Answer any one question from Q5 & Q6
5 (a)
Define Phase Velocity and Group Velocity. Hence obtain the relation between Vp and Vg for DeBroglie Wave.
6 M
5 (b)
Explain the physical significance of ? and |?|2.
4 M
5 (c)
An electron is bounded by an infinite potential well of width 2 ?10-8. Calculate the lowest two permissible energies of an electron.
(Give: h=6.64?10-34 J- sec., m=9.1 ? 10-31 kg)
(Give: h=6.64?10-34 J- sec., m=9.1 ? 10-31 kg)
3 M
6 (a)
Derive Schroedinger?s Time Independent Wave Equation.
6 M
6 (b)
State DeBroglie?s Hypothesis. Hence obtain the relation for DeBroglie?s Wave Length in terms of Energy.
4 M
6 (c)
The position and momentum of 1 kev electron are simultaneously measured. If its position is located within 1A?. Find the percentage of uncertainty in its momentum.
(Given: h=6.64?10-34 J-sec., m=9.1?10-31 kg)
(Given: h=6.64?10-34 J-sec., m=9.1?10-31 kg)
3 M
Answer any one question from Q7 & Q8
7 (a)
Explain the Phenomena of Super-conductivity. Explain
Type - I and Type - II Super-conductors.
6 M
7 (b)
Explain any two applications of Nano-technology.
4 M
7 (c)
Explain any two properties of Nano-particle.
3 M
8 (a)
Explain Synthesis of Metal Nano-particle by Collidal Route Method.
6 M
8 (b)
Explain BCS Theory of Super-conductivity.
4 M
8 (c)
State and explain:
(i) Meissner Effect
(ii) Persistent Current
(i) Meissner Effect
(ii) Persistent Current
3 M
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