Science
Physics
Light- reflection and refraction
Kindly show the diagram on a paper experts not digitally. Please
Solution
FOR LENS L1:
f=+25cm
P=1/f (in metres)
P=100/f ( in cm)
P=100/25
=4 dioptres.
P=+4D.
Here, + sign indicates that given lens L1 is converging or Convex lens.
FOR LENS L2:
f=- 25cm
P=100/f (in cm)
P= 100/-25
=-4 dioptres.
P= -10D
Here, negative sign indicates it is concave or diverging lens.
Lens L1 that is Convex lens will form virtual, magnified image when object is placed at 20 cm ( in between Optic centre and Focus)
When an object is placed in between focus and optical centre, a virtual image is formed. The size of the image is larger than that of the object.
FOR LENS L1:
f=+25cm
P=1/f (in metres)
P=100/f ( in cm)
P=100/25
=4 dioptres.
P=+4D.
Here, + sign indicates that given lens L1 is converging or Convex lens.
FOR LENS L2:
f=- 25cm
P=100/f (in cm)
P= 100/-25
=-4 dioptres.
P= -10D
Here, negative sign indicates it is concave or diverging lens.
Lens L1 that is Convex lens will form virtual, magnified image when object is placed at 20 cm ( in between Optic centre and Focus)
When an object is placed in between focus and optical centre, a virtual image is formed. The size of the image is larger than that of the object.