An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20

• Optics

An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20. To the observer the tree appears:

1. 10 times nearer
2. 20 times taller
3. 20 times nearer
4. 10 times taller

Solution

Telescope creates a focused image of a distant object, so that the object looks nearer. Magnifying power of telescope, M = 20, implies that the tree appears 20 times nearer.

The correct option is C.