In the eye of a person suffering from myopia (nearsightedness),where is the image of a distant object formed?

Name the two phenomena involved in the formation of a rainbow.

Which optical phenomenon is responsible for the early sunrise and delayed sunset?

$A$ person cannot see objects farther than $12\, m$ from the eye clearly. Name the defect of vision he is suffering from and the lens that should be used for correction of this defect. Illustrate with the help of a diagram,how this lens will correct the defective vision?

The peacock blue color is formed by the superposition of which two colors of light?

$A$ person cannot see objects distinctly when placed beyond $2\, m$.
$(a)$ Identify the eye defect.
$(b)$ Give two reasons for this defect.
$(c)$ Calculate the power and nature of the lens he should be using to see the distant objects clearly.
$(d)$ Draw the ray diagrams for the defective and the corrected eye.