$A$ man wearing glasses of focal length $+1\, m$ cannot see objects beyond $1\, m$. What is the defect in his eye?

Give one example in nature where we can see the dispersion of white light.

What is dispersion of light? Name the $(i)$ component of white light that deviates the least,$(ii)$ component of white light that deviates the most,while passing through a glass prism.

What happens when white light is incident on a white object?

When do we consider a person to be myopic or hypermetropic? Explain using diagrams how the defects associated with myopic and hypermetropic eye can be corrected?

Which of the following phenomena of light are involved in the formation of a rainbow?