Test: Light - 2 - Class 7 MCQ

Images formed by a plane mirror are upright, virtual, and the same size as the object.

Dispersion through a prism involves the separation of different colors in white light as they bend differently.

Mirror mazes utilize the principle of reflection in plane mirrors, creating multiple images of the observer.

A rainbow is formed by the refraction and reflection of the sun's rays through raindrops.

Convex mirrors are used for security to have a broader view, as they produce virtual, erect, and diminished images.

When the object is close to a convex lens, the image formed is virtual, erect, and magnified.

When David is 4 meters away from the mirror, the image is also 4 meters away from the mirror, making the total distance between David and his image 8 meters.

If David moves 1 meter closer to the mirror, he will be 3 meters away from it. His image will still be 3 meters behind the mirror, so the new distance between David and his image is:

3 meters (David to mirror)+3 meters (mirror to image)=6 meters.

Thus, the correct answer is c) 6 meters.

Concave lenses are used to correct short-sightedness as they diverge light.