Physics
Grade-10
Easy
Question
The focal length of a concave lens is always ____.
- Positive
- Negative
- Neutral
- Cannot say
Hint:
- A concave lens is a type of lens that diverges a straight light beam from the source into a diminished, upright, virtual image.
The correct answer is: Negative
- A concave lens is a type of lens that diverges a straight light beam from the source into a diminished, upright, virtual image.
- It has the ability to create both real and virtual images.
- Focal length of convex lens is positive
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