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The wavelengths for the light of red and blue colours are nearly 7.8 × 10-7 m and 4.8 × 10-7 m respectively. Which colour has the greater speed in vacuum?
Chapter: [6] Spectrum
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Fig shows part of the arrangement for obtaining pure spectrum.
(a) Complete thediagram and show how to obtain a pure spectrum.
(b) What are the conditions necessary for obtaining a pure spectrum?
Chapter: [6] Spectrum
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Distinguish between longitudinal and transverse waves.
Chapter: [7] Sound
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What do you understand by amplitude of an oscillation?
Chapter: [7] Sound
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State two factors on which the velocity of a wave depends.
Chapter: [7] Sound
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How does the velocity of a wave vary with temperature?
Chapter: [7] Sound
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The speed of a wave is 350 ms-1. Find the wavelength of the wave whose frequency is 700 Hz.
Chapter: [7] Sound
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Distinguish between crest and trough.
Chapter: [7] Sound
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Which has a greater speed: mechanical wave or electromagnetic wave?
Chapter: [7] Sound
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Can sound waves pass through vacuum?
Chapter: [7] Sound
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What are characteristics of a wave motion?
Chapter: [7] Sound
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What is the range of hearing for a normal person?
Chapter: [7] Sound
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Name the principle used to find the depth of a sea.
Chapter: [7] Sound
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Give two applications of supersonics.
Chapter: [7] Sound
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What are the lowest and highest limits of frequencies of sound which is audible to a human ear?
Chapter: [7] Sound
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