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What is the echo of the launched pulse?
Any discontinuity into the medium of propagation of an ultrasonic pulse provides rise to back-reflection that travels back to the input and is termed as the echo of the launched pulse. Therefore Ultrasonic pulse-echo data comprises of (a) time elapsed among the launch of the pulse and the received echo and (b) intensity /energy of the received echo. Some different ways are there in this data can be presented for visualization/measurement. Three most common formats are called into the NDT (Non-Destructive Testing) world like A-scan, B-scan and C-scan presentations. Every presentation mode gives a diverse way of looking at and estimating the region of material being inspected. Latest computerized ultrasonic scanning systems can exhibit data into all three presentation forms concurrently.
Hubble constant; H0 (E.P. Hubble; 1925): The constant that determines the relationship among the distance to a galaxy and its velocity of recession because of the expansion of
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The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m
Q. Illustrate how do you find the refractive index of a liquid by using total internal reflection? Answer:- Using Snell's law n (1) = (n (2) x sin angle (2)) / sin angl
A cue ball has a mass of 0.160 kg is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.40 Ns to the ball. He ball the
Q. Tunnels through the Earth Assume a straight tunnel is cut from the surface of the earth to the opposite side through the centre. The object is going down the tunnel and a
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It is described as the nature of charge potential of charge potential is of two types: (i) Positive potential: with respect to positive charge. (ii)Negative potential: with r
Determine about the Stacking fault Stacking faults happen in a number of crystal structures, but the common example is in close-packed structures. Face-cantered cubic (f
What do you mean by Normal shift? How can you calculate total internal reflection? Mention an application of total internal reflection.
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