Question

Magnifying power of a concave lens is
(a) Always > 1
(b) Always < 1
(c) Always = 1
(d) can have any value
Plzzzz answer this ...... Urgent

Answer 1

Answer:

The magnifying power of a concave lens is always < 1.

Explanation:

Why is the magnifying power of a concave lens always less than 1?

• Magnifying power of the lens is the ratio of the height of the image to the height of the object.
• Magnifying power = h'/ h.

Where, h' = height of the image

h = height of the original object

• When an object is placed in front of a concave lens, it gives virtual, upright and reduced size of image on the side of the object.
• Here the reduced size of the image is produced, so the magnification produced is less than one because the height of the image is smaller than the original height of the object.

That's why the magnifying power of the concave lens is always less than 1.

#SPJ3

Answer 2

(b) Always < 1 is the ideal answer.

Explanation:

• Concave lenses constantly produce images that are upright, virtual, decreased in length, and positioned at the item's aspect of the lens.
• From the magnification formula, it's miles clean that the magnification varies directly with the dimensions of the image.
• The image formed via way of means of a concave lens is constantly smaller than the item.
• Therefore, the magnification produced via way of means of a concave lens is constantly much less than 1.
• Magnification power is calculated via way of means of dividing the focal duration of the scanning item (lens) via way of means of the focal duration of the eyepiece.
• A 1x magnification energy is a 100 percent increase withinside the magnified item's length For example, a 1-inch item at 1x could appear like 2 inches.

#SPJ6