The device or arrangement to detect and check plane polarized light is called
The analyzer is the device or arrangement or the second Polaroid to detect whether the light is polarized or not.
The device used for detecting charge (positive or negative) on an object is called:
(a) stethoscope (b) telescope (c) kaleidoscope (d) electroscope
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