Turbidity index of water at different depths issobtained by a- (a)Hard disc (b)Hard plate (c)Sechhi disc. (d)None of the above
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Turbidity index of water at different depths is obtained by a Secchi disc.
Option: (c)
Explanation:
- It is an instrument used to determine the transparency of water or the amount of turbidity. The instrument allows a beam of light to fall.
- If there is no turbidity then the ray would pass undeviated. Turbidity is actually the amount of light scattered by the dissolved substances in water.
- This can be explained as more the amount of dissolved particle the more is the amount of scattering.
- Hence the amount of suspended particle can be measured at different depths of the pond.
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