21. Which is a correct way to measure wavelength?
22. If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is
23. Why are we able to hear short wave broadcasts better than long wave broadcasts ?
24. The frequency of ultrasound wave is typically
25. Which of the following has the highest frequency?
26. Matter waves are
27. Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :
28. Intensity of any wave is proportional to which of the following?
29. If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?
30. Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
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