Name the part of the eye where the image is formed by the eye lens. What is the nature of the image formed? How is this image sent to the brain?

A person can comfortably read a book but finds it difficult to read the number on a bus parked 5 m away from him. Name the type of defect of vision he is suffering
from. Which type of lens should be used in his spectacles to correct his vision?

What is tyndall effect? Explain with an example?

How it can be proved that the basic structure of the modern periodic table is based on the electronic configuration of atoms of different elements?

Draw a ray diagram to show the refraction of light through a glass prism. Mark on it,

1. The incident ray,
2. The emergent ray,
3. The angle of deviation.

Explain why, if we look at objects through the hot air over a fire, the objects appear to be moving (or shaking) slightly.

A beam of light consisting of consists of three. namely red (R), Green (G) and yellow (Y) on the prism as shown below. Complete the diagram to show refracted and emergent ray.

Explain why, the sun can be seen about two minutes before actual sunrise. Draw a diagram to illustrate your answer?

When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.

Explain why, when the sun is overhead at noon, it appears white, but when the same sun is near the horizon at sunset, it appears red?