Question: What is a convex mirror?
Answer: A mirror which reflects the light from its inner polished side.
Question: What is a concave mirror?
Answer: A mirror, which reflects light from its outer polished surface.
Question: What kind of image is formed by a plane mirror?
Answer: It forms an erect, virtual and image of same size as that of the object.
Question: What kind of image is formed by a concave mirror?
Answer: It can form both real and virtual, erect or inverted image.
Question: How will you identify a concave lens by touching it?
Answer: A concave lens is thinner at the center and thicker at the edges.
Question: What is rainbow?
Answer: The rainbow is an arch of seven colours seen in the sky.
Question: What does act as prism in the formation of a rainbow?
Answer: Tiny raindrops suspended in atmosphere act as prisms in the formation of a rainbow.