The Focal Length of; (i) Convex Mirror (ii) Concave Mirror, and (ii) Convex Lens, Using the Parallax Method NEET Questions

Physics - Experimental Skills

The Focal Length of; (i) Convex Mirror (ii) Concave Mirror, and (ii) Convex Lens, Using the Parallax Method MCQ Questions


1.
Parallax is defined as:
A.
The distance between two points
B.
The actual movement of an object
C.
The brightness of an image
D.
The apparent shift in the relative position of two objects when viewed from different positions
😑 View Answer Rough Work Error
ANSWER :
D. The apparent shift in the relative position of two objects when viewed from different positions
2.
Two objects show NO parallax when:
A.
One is behind the other
B.
They are far apart
C.
They are at the same position (or distance from the observer)
D.
They are at different distances
😑 View Answer Rough Work Error
ANSWER :
C. They are at the same position (or distance from the observer)
3.
In the parallax method for finding focal length, what is removed by adjusting the position of an object/needle?
A.
The brightness of the image
B.
The colour of the image
C.
The size of the image
D.
The parallax between the image and a reference object (needle)
😑 View Answer Rough Work Error
ANSWER :
D. The parallax between the image and a reference object (needle)
4.
If the image and the needle (reference) are not at the same position, moving the eye sideways causes them to:
A.
Stay fixed together
B.
Disappear
C.
Appear to shift relative to each other (parallax exists)
D.
Grow larger
😑 View Answer Rough Work Error
ANSWER :
C. Appear to shift relative to each other (parallax exists)
5.
To remove parallax, the needle is moved:
A.
Sideways only
B.
Up and down only
C.
Just removed
D.
Toward or away from the mirror/lens until it coincides with the image
😑 View Answer Rough Work Error
ANSWER :
D. Toward or away from the mirror/lens until it coincides with the image
6.
The parallax method is suitable for measuring focal lengths because it:
A.
Uses high-tech equipment
B.
Works only for virtual images
C.
Doesn't require any apparatus
D.
Provides accurate location of real images that can be located on a scale
😑 View Answer Rough Work Error
ANSWER :
D. Provides accurate location of real images that can be located on a scale