Q5 of 30 Page 213

A passenger in an aero plane shall

As aero plane is at higher altitude, the passenger in an aero plane may see a primary and a secondary rainbow like concentric circles.


If the object moving with a constant velocity (V0) towards the convex lens from infinity to focus the image will move slowly in the starting and then faster and also

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3

A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, will the current increase or decrease? Explain.

 4

Professor C.V Raman surprised his students by suspending freely a tiny light ball in a transparent vacuum chamber by shining a laser beam on it. Which property of EM waves was he exhibiting? Give one more example of this property.

 6

What is the shape of the wave front on earth for sunlight?

 7

An electron (mass m) with an initial velocity is in an electric field . It’s de Broglie wavelength at time t is given by