Question

Consider the following questions about lenses.

a. How will the image produced by a lens change as it is moved further away from an object?

b. How will the image change if the lens is moved towards an object?

c. How would the image change if half the top half of the lens was covered?

d. How would the image change if the center of the lens was covered? Would the whole image still form

Answer 1

Sol:

a) for a lens , when lens is moved away from object the size of image decreases and when lens is to the farthest point the image will be highly diminished.

b) if lens is moved toward the object the image will get bigger.

c) the image will be formed fully without any flaws but there is decrease in the brightness of the image.

d) if the center of lens is covered then lens will be divided into two parts but both parts have same refractive index hence the form image at the same point there is no change in image , image will form fully.