Friday , August 19 2022

NCERT 7th Class (CBSE) Science: Light

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.

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One comment

  1. Please send me the sample papers of Class 7 Science.