In: Physics
Draw diagrams to indicate qualitatively the position, nature, and size of the image formed by a converging lens of focal length f for the following object distances: (a) infinity, (b) greater than 2f, (c) equal to 2f, (d) between 2f and f, (e) equal to f, (f) less than f.
a) Object at infinity-- image is formed at focal point , that is
at distance from the lens. ( the
image will be reduced in size)
b) Object at a distance greater than -- image is formed
between
and
, and will
be real,inverted and reduced in
size.
c) Object at a distance equal to -- image is formed at
, and
will be real, inverted and of same size as that of
object.
d) Object at a distance between
and
--- image is formed
beyond
, and will be,
real , inverted and enlarged in size.
e) Object at a distance equal to -- image formed at
infinity.
f) Object at a distance less than -- image is formed
behind the object, and will be virtual, upright and
enlarged in size.