Question

In an astronomical telescope, the intermediate image is:
a. Virtual, erect and magnified
b. Real, erect and magnified
c. Real, inverted and reduced
d. Virtual, inverted and reduced

Answer 1

Hint: Telescopes provide the image of the distant object. It gives the image based on the electromagnetic radiations emitted by the object. Astronomical telescopes are used for viewing distant celestial bodies such as the sun, moon, planets, etc. Astronomical telescopes are of two types based on the images produced by either refracting or reflecting. If the telescope produces images by refracting it is made up of lenses. If the telescope produces images by reflecting it is made up of mirrors.

Complete step by step answer:

The astronomical telescope has two lenses called the eyepiece lens and the objective lens.
Objective lens - It is the closest lens to an object and the initial image is formed by the objective lens. The image formed by this lens is called an intermediate image.
Eyepiece lens - It provides an image of an object to an eye with a much larger angle.
The objective lens forms an inverted image of an object. Therefore the intermediate image is inverted and we know that inverted images are real. Hence the intermediate image is real and inverted and reduced.

Hence, the correct answer is option (C).

Note: Telescopes are used to view the distant objects. It is made up of both mirrors and lenses. There are two main parts in the astronomical telescopes. They are objective and eyepiece. The objective forms an intermediate image which is real and inverted. This intermediate image is focussed on a secondary focal plane. It is then viewed by the eyepiece to produce the virtual, erect, and clear image.