Advertisements
Advertisements
प्रश्न
Consider two statements A and B given below:
A: real image is always inverted
B: virtual image is always erect
Out of these two statements:
विकल्प
Only A is true
Only B is true
Both A and B are true
None is true
उत्तर
both A and B are true
A real image is always inverted and a virtual image is always erect.
APPEARS IN
संबंधित प्रश्न
Define the power of a lens.
Define 1 dioptre of power of a lens.
Find the power of a concave lens of focal length 2m.
Express the power (with sign) of a concave lens of focal length 20 cm.
A pin of length 2.00 cm is placed perpendicular to the principal axis of a converging lens. An inverted image of size 1.00 cm is formed at a distance of 40.0 cm from the pin. Find the focal length of the lens and its distance from the pin.
A convex lens produces a double size real image when an object is placed at a distance of 18 cm from it. Where should the object be placed to produce a triple size real image?
Focal length : metre : : power of lens : _______
The power of lens depends on the focal length of the lens
Match the following:
| Column - I | Column - II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b | Far point comes closer |
| 3 | Ciliary muscles | c | near point moves away |
| 4 | Myopia | d | Screen of the eye |
| 5 | Hypermetropia | e | Power of accommodation |
Assertion and reasoning type
- Assertion: Myopia is due to the increase in the converging power of eye lens.
- Reason: Myopia can be corrected with the help of concave lens.
