KVPY Government Jobs Exams

In Young's double slit experiment, the distance between the two slits is 0.1 mm, the distance between the slits
and the screen is 1 m and the wavelength of the light used is 600 nm. The intensity at a point on the screen is
75% of the maximum intensity. What is the smallest distance of this point from the central fringe ?
(A) 1.0 mm (B) 2.0 mm (C) 0.5 mm (D) 1.5 mm

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KVPY Other Question

Velocity of sound measured at a given temperature in oxygen and hydrogen is in the ratio -
(A) 1 : 4 (B) 4 : 1 (C) 1 : 1 (D) 32 : 1 Two masses m1 and m2 are connected by a massless spring of spring constant k and unstreched length l. The
masses are placed on a frictionless straight channel – which we consider our x-axis. They are initially at rest
at x = 0 and x = l, respectively. At t = 0, a velocity of v0 is suddenly imparted to the first particle. At a later
time t0, the centre of mass of the two masses is