Physics
For a convex lens,the value of magnification m is :
- positive
- negative
- both positive as well as negative
- none
Answer
both positive as well as negative
Reason — The magnification m is:
- Positive when the image is upright (virtual) and on the same side as the object.
- Negative when the image is inverted (real) and on the opposite side of the lens compared to the object. Hence, for a convex lens,the value of magnification m is positive as well as negative.
Related Questions
Identify the wrong statement.
- For a convex lens, u is always negative.
- For a convex lens, f is always positive.
- For a convex lens, v is positive for a virtual image and negative for a real image.
- For a concave lens, u, v and f all are negative.
If the magnification produced by a lens is -0.5, the correct statement is:
- the lens is concave
- the image is virtual
- the image is magnified
- the image is real and diminished formed by a convex lens
The numerical value of magnification m is always …………… for a concave lens.
- equal to 1
- less than 1
- more than 1
- variable