In measuring instruments a mirror is provided behind the pointer with a purpose that
A. with the help of the mirror it may be seen whether the pointer is bent or not
B. the scale is illuminated through the mirror
C. reading errors due to inclined observation are eliminated by removing parallax between the pointer and its image in the mirror
D. any of the above.
Answer:C
In measuring instruments a mirror is provided behind the pointer with a purpose that
A. with the help of the mirror it may be seen whether the pointer is bent or not B. the scale is illuminated through the mirror C. reading errors due to inclined observation are eliminated by removing parallax between the pointer and its image in the mirror D. any of the above.