Total mark -36
Total time -90 minutes
Each question carries carries 3 marks
Q1- Obtain the relation between angle of minimum deviation for a prism and its refractive index .
Q2- Draw the ray diagram for reflecting type telescope . Write down advantages of reflecting type telescope over refracting type telescope .
Q3- define critical angle . Write down the condition for total internal reflection .What is optical fibre .
Q4-Write down Huygens principles . Draw the diagram for wavefront due to a point source.
Q5- Prove that for destructive interference path difference between the two light waves should be odd integral multiple of λ/ 2.
Q6- State Malus law . Prove that when light is incident at polarising angle on a reflecting surface angle between reflected and refracted light is 90 º
Q7- Draw a ray diagram for Davission and Germer experiment . Write down few uses of de Broglie’s hypothesis.
Q8- State Bohr’s postulate . Write down its failures .
Q9- Draw and explain binding energy curve.
Q10- Explain the working of zener diode as voltage regulator
Q11- Give the Boolean expression and truth table of NAND gate . How OR gate can be obtained from NOR gate and NAND gate ?
Q12- Define the following terms :- noise , attenuation and modulation .