(a) Define focal length of a divergent lens.
(b) A divergent lens of focal length 30 cm forms the image of an object of size 6 cm on the same side as the object at a distance of 15 cm from its optical centre. Use lens formula to determine the distance of the object from the lens and the size of the image formed.
(c) Draw a ray diagram to show the formation of image in the above situation.
Answers
Answered by
2
Answer:
a) The focus of a divergent i.e. concave lens is the point on the principal axis from which the light rays parallel to the axis is diverged after passing through the lens. The distance between the pole of the concave lens and principal focus is called Focal length.
(b) Given: Focal length, f = -30 cm
Size of the object, h1 = 6 cm
Image distance, v = -15 cm
therefore
To calculate the height of the image
(d) The ray Diagram is as follows:
Explanation:
Similar questions