Question

where to place an object in front of a convex lens to get a realistic and large image of an object. 1. on the main focus of the lens 2. double focus distance between the main focus of the lens 3. on infinity 4. between the main focus on the light center of the lens​

Answer 1

Question:

Where to place an object in front of a convex lens to get a realistic and same image of an object.

Options:

1. On the main focus of the lens.
2. Twice of focus distance between the main focus and lens.
3. On infinity.
4. Between the main focus on the light centre of the lens.

Answer:

The object should be placed Twice of focus distance between the main focus of the lens to get a realistic and same large image of an object.

• The image above is formed in the convex lens and image is formed real.
• When an object is placed at the centre of curvature then a ray of light is parallel to principal axis after the reflection is passed to focus point F.
• Convex mirror diverges light when strikes on reflecting surface.
• Convex mirrors are spherical mirrors which are curved outwards.