1.

Suggest one way, in each case, by which we can detect the presence of:(1) Infrared radiations (2) Ultraviolet radiations

Answer»

(1) Infrared radiations : These are detected by a thermopile.

(2) Ultraviolet radiation : when a silver chlortile solution is taken in a test tube and is passed from red to violet light no change is seen. But beyond the violet end. the solution first turns violet and then it turns dark brown.



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