State whether true or false:
Both the telescopes and compound microscope make use of two lenses-one concave and one convex.
A.True
B.False

Hint: Here, apply the basic concepts and uses of both the microscope and the telescopes. Also, the types of lenses used in both the instruments which produce the image.

Complete step by step answer:
The basic difference between the telescope and the microscope is that- in the microscope a very small object is placed at a short distance to magnify the object from the viewer whereas, the telescopes are used to magnify the large objects which are placed at a large distance from the viewer.
Typically, in the refracting telescopes, two convex lenses are used. One lens works as the objective lens which gathers the light from the faraway objects and forms a real and an inverted image of the object at its focal point. The second lens is known as the eyepiece.
As we know that the microscopes are used to observe the small to minute objects which create magnified images. The simple microscope consists of the single convex lens where the lens is held close to the object so that the object is between the lens and its focal point.
As, the telescopes use two convex lenses and the microscope uses a single convex lens and therefore, the given statement - Both the telescopes and compound microscope make use of two lenses-one concave and one convex is false.
Hence, from the given multiple choices option B is the correct answer.

Note:
Always remember the types of the lenses, its uses and the type and the size of the image produced when the object is placed at different distances.