Share G-11 Phys Ch-8
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A ______ image cannot be formed on a screen.
virtual
Both real and virtual image formed by a _____ lens.
convex
When an object is between F and 2F , the image is formed in _______.
beyond 2F
The unit of power of a lens is _____.
dioptre (D)
A convex lens is ______ lens.
converging
The power of a lens is inversely proportional to its _____.
focal length
The distance between the centre of lens and object is _______.
object distance
In concave lens , only the ______ image formed.
virtual
The magnification of a real image has ______ sign because it is inverted.
minus or negative
P= - 25 D , Which types of lens is used?
concave lens
Lens equation is
1/u + 1/v = 1/f
Can the concave lens be used as a magnifying glass?
No
A ______ lens diverge the rays of light.
concave
II; = + 2 OO; , magnification is ____. Is the image is erect or inverted?
+ 2 / erect
Lens-maker's equation is
1/f = (n-1) (1/R1 + 1/R2)
The distance between F and P is
focal length
