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Longitudinal waves do not exhibit
A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate the distance from the wall. (The speed of sound in air is 300ms-1)
The sound from a bell in a enclosed jar gradually faints away while the jar is being evacuated. Which of the following explains this observation?
Light travels ins straight lines. In which of the following is this principle manifested?
I. Pinhole camera
II. Formation of shadows
III. Diffraction of light
IV. Occurrence of eclipse