1.

A device which works on the reflection of light from two plane mirrors arranged parallel to one another is: (a) electroscope (b) kaleidoscope (c) periscope (d) stethoscope

Answer»

A device which works on the reflection of light from two plane mirrors arranged parallel to one another is:

(a) electroscope

(b) kaleidoscope

(c) periscope

(d) stethoscope



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