Concept:A real image can be projected on a screen. Only a convex lens can form a real image of an object.
Explanation:To project an image on a wall, the device must produce a real image that can be focused on a surface.
A plane mirror always gives a virtual image behind it. It cannot be projected.
A convex mirror also forms a virtual, diminished image behind the mirror. Not useful for projection.
A concave lens diverges light and always creates a virtual, erect and smaller image. It cannot form a real image.
A convex lens converges light rays. By adjusting the distance between the painting and the lens, a real, inverted image can be formed on the opposite side. This real image can be caught on a wall.
Thus, only a convex lens can project the painting's image.
Spherical mirror
The mirror having curved reflecting surfaces is called a spherical mirror.
There are two types of spherical mirrors: Concave and convex.
A concave mirror has a reflecting surface curved inwards and the convex mirror has a reflecting surface curved outward.
The concave mirror can form a real image when the object is kept at certain locations.
The convex mirror cannot form a real image.
Spherical lens
A transparent medium bounded by the spherical surface is the lens.
A concave lens has both surfaces curved inward and a convex lens have both surfaces curved outwards.
A convex lens can form a real image. when the object is kept at certain distances.
A concave lens cannot form real images.
Explanation:
Only real images can be obtained on the screen.
To obtain the real image on the screen, we can use either a convex lens or a concave mirror.
In the given options only the convex lens can form real image.
A real image can be obtained on a wall just like a screen.
So, the correct option is convex lens.
Additional Information
The image formation by the convex lens is shown below diagram.
Answer:D. Convex lens
