In which is a convex mirror used?

Think it through first, then pick an option.

a solar cooker
b torch light
c radar
d a car's view mirror

Answer and explanation

Correct answer: d a car's view mirror

A convex mirror gives an upright, smaller image, so it is used as the rear-view mirror of cars to see a large scene in a small space. A torch light has a concave mirror; solar cookers and radar are not in this book.

Why the other options are wrong

a solar cooker: This is not the answer: A convex mirror gives an upright, smaller image, so it is used as the rear-view mirror of cars to see a large scene in a small space. A torch light has a concave mirror; solar cookers and radar are not in this book.
b torch light: This is not the answer: A convex mirror gives an upright, smaller image, so it is used as the rear-view mirror of cars to see a large scene in a small space. A torch light has a concave mirror; solar cookers and radar are not in this book.
c radar: This is not the answer: A convex mirror gives an upright, smaller image, so it is used as the rear-view mirror of cars to see a large scene in a small space. A torch light has a concave mirror; solar cookers and radar are not in this book.