A lens with a power of +1.5 D is a convex lens. The positive power implies that the lens converges light. Using the formula P = 1/f, where P is power and f is the focal length, we find that ...

A lens with a power of -3.5 D indicates a concave lens. To find the focal length, we can use the relationship between power (P) and focal length (f), where P = 1/f. Therefore, the focal length would be -0.29 ...

A concave mirror is more likely to give a full image of a large object. This is because concave mirrors have the ability to form real and magnified images, providing a more detailed representation of large objects compared to plane ...

For an object at infinity, the convex mirror forms a virtual and diminished image. For a finite distance object, the convex mirror also forms a virtual and diminished image.

The first position is when the object is at infinity, and the second position is when the object is at a finite distance from the convex mirror.