Section E: Answer the case-based question given below
The lenses forms different types of images when object placed at different locations. When a ray is incident parallel to the principal axis, then after refraction, it passes through the focus or appears to come from the focus.
When a ray goes through the optical centre of the lens, it passes without any deviation. If the object is placed between the focus, and optical centre of the convex lens, an erect, and magnified image is formed.
As the object is brought closer to the convex lens from infinity to focus, the image moves away from the convex lens from focus to infinity. Also the size of image goes on increasing, and the image is always real, and inverted. A concave lens always gives a virtual, erect and diminished image irrespective of the position of the object.
i. What is the size of image formed by convex lens when object is at infinity?
ii. When an object is at principal focus of a convex lens, the magnification is?
iii. At which location of object in front of concave lens, the image between focus and optical centre is formed?
iv. Where will the image form by a convex lens when an object is placed at infinity?
v. What happens when an object is at the focal point of a concave lens?
When a ray goes through the optical centre of the lens, it passes without any deviation. If the object is placed between the focus, and optical centre of the convex lens, an erect, and magnified image is formed.
As the object is brought closer to the convex lens from infinity to focus, the image moves away from the convex lens from focus to infinity. Also the size of image goes on increasing, and the image is always real, and inverted. A concave lens always gives a virtual, erect and diminished image irrespective of the position of the object.
i. What is the size of image formed by convex lens when object is at infinity?
ii. When an object is at principal focus of a convex lens, the magnification is?
iii. At which location of object in front of concave lens, the image between focus and optical centre is formed?
iv. Where will the image form by a convex lens when an object is placed at infinity?
v. What happens when an object is at the focal point of a concave lens?
i. The size of image formed by a convex lens when the object is placed at infinity of convex lens is .
ii. When the object is placed at \(F\) in front of convex lens, the nature of image is .
iii. In the case of a concave lens, when an object is placed anywhere between the
the image is formed will be between focus, and optical center, on the same side of the lens.
iv. The location of image formed by a convex lens when the object is placed at centre of curvature is on the other side.
v. When the object is placed at the focus of concave lens, the image formed is .