A new antiterrorist technique detects the differences in

is col Q 7 they are exactly out of phase and the interferen 4 A travelling wave at a rigid boundary or a closed end is reflected with a phase reversal but the reflection at an open boundary takes place without any phase change For an incident wave acos wel a cosciutto y x t a sin kx wt the reflected wave at a rigid boundary is y x t a sin kx wt For reflection at an open boundary y x t a sin kx wt 1 2 cos a cos uteg 2 kn wt 2 oring in opposite directions produces standing

1 the wave intensity remains constant for a plane wave 2 the wave intensity decreases as the inverse square of the distance from the source for a spheric wave 3 the wave intensity decreases as the inverse of the distance from a line source total power of the spherical wave over the spherical surface centered at the source remai constant at all the times

In Fraunhoffer diffraction pattern obtained with a single slit at the angular position of first diffraction minimum the phase difference in radian between the wavelets from the opposite edges of slit is a b 2 c TC T T d

instantaneous picture of a longitudinal harmonic wave travelling along the negative x axis Identify the correct statement s related to the movement of the points shown in the figure un vp v d mink YA a A a C f V b C e h g k The points moving in the direction of wave are A b B c C f D i X The points moving opposite to the direction of propagation are B d D j The stationary points are A a C g T B c D k The points of maximum compression are A c B g D k

1 PHYSICS In closed end pipe of length 105 cm standing waves are set up corresponding to the third overtone What distance from the closed end amongst the following is a pressure node 1 20 cm 2 60 cm 3 85 cm 4 45 cm The tension length diameter and density of a string B are double than that of another string A Which fundamental frequency of A the strings are fixed

C 74 In Young s double slit experiment angular width of fringes is 0 20 for sodium light of wavelength 5890 If complete system is dipped in water then angular width of fringes becomes RPET 1997 a 0 11 c 0 22 b 0 15 d 0 30 between

1012 A wave of length 2m is superposed on its reflected wave to form a stationary wave A node is located at x 3m The next node will be located at x 1 3 25 m 2 3 50 m 3 3 75 m 44m

Find the time taken by the particle in going from x 0 to x 2 x Asinot A 2 A sin ot T sin sin 6 TU 2 11 6 T t 2 t t T 12 where A is the amplitude

The linear density of a vibrating string is 1 5x10 kg m The equation of a transverse wave along the string is given by y 0 02 2x 60t where x y are in m and t in s The tension in the string is

Given equation is related to 2 X y cos x cos 2 vt 2 1 Transverse progressive 2 Longitudinal progressive 3 Longitudinal stationary wa 4 Transverse stationary wave