Trough of a wave acts as:
Correct answer: A. Concave lens
- A. Concave lens
- B. Convex lens
- C. Convex mirror
- D. Plane mirror
Explanation
The trough of a wave is the lowest point on the wave.A concave lens is a lens having one of both surfaces curved inwards. They are also known as diverging lens and cause the spread of light passing through it. The highest position on the wave is called the crest, which acts as a convex lens. Water waves can be used to demonstrate this phenomenon. The water acts as a lens when light is passed through it. On white paper, the crest and trough are shown as alternate bright and dark lines respectively.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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