Question

The depth of Euphotic zone is measured by ____________

(a) Calorimeter

(b) Turbidity meter

(c) Secchi disk

(d) Radar

This question was posed to me in an international level competition.

I would like to ask this question from Biological Zones in Lake in division Natural Methods of Wastewater Disposal of Environmental Engineering

Answer 1

Right choice is (c) Secchi disk

The explanation: The depth of Euphotic zone is measured by Secchi disk where it is put in the lake and the depth at which the disk becomes invisible is taken as the depth of Euphotic zone.