Q.1. Explain what makes things visible to us.

Q.2. Name the type of lens which diverges a beam of parallel rays of light.

Q.3. Is the image formed by a plane mirror always upright?

Q.4. Explain why are concave and convex mirrors called spherical mirrors.

Q.5. Is it possible to obtain the image on the screen when the candle is too close to the concave mirror?

Q.6. Explain whether mirror change the direction of light.

Q.7. The image formed by a lens is always virtual, erect and smaller in size for an object kept at different positions in front of it. Identify the nature of the lens.

Q.8. Observe the given figures.

The given figures show the path of light through lenses of two different types represented by rectangular boxes A and B. What is the nature of lenses A and B?

Q.9. Name the colours included in the composition of sunlight.

Q.10. In the formation of a rainbow, what acts as tiny prisms?

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