Question

Microscopes are used to see extremely minute things which cannot be seen by our naked eyes.
p. Optical Microscope
q. Scanning tunneling Microscope
c. Atomic Force Microscope
These are some of the microscopes that are invented. Which of these given microscopes can be used to see nanostructures?
A) only p and q
B) only r and q
C) only p and r
D) all p, q, r

Answer 1

A microscope is a scientific device that is used to study items that are too tiny for the naked eye to perceive. Microscopy is the science of using a microscope to study tiny objects and structures. Unless assisted by a microscope, microscopic means undetectable to the naked sight. Microscopes come in a variety of shapes and sizes, and they may be classified in a variety of ways.

Complete answer:
The optical microscope, often known as a light microscope, is a type of microscope that generates magnified pictures of tiny objects by using visible light and a set of lenses. Although many sophisticated designs attempt to enhance resolution and sample contrast, basic optical microscopes can be relatively simple.
STMs (scanning tunnelling microscopes) are microscopes that are used to image surfaces at the atomic level. STM detects surface characteristics with a 0.01 nm (10 pm) depth resolution by employing a very fine conducting tip that can differentiate features smaller than 0.1 nm. Individual atoms may now be seen and altered on a regular basis.
Atomic force microscopy (AFM), also known as scanning force microscopy (SFM), is a kind of scanning probe microscopy (SPM) that has exhibited resolution on the scale of fractions of a nanometer, which is more than 1000 times higher than the optical diffraction limit. Atomic force microscopy (AFM) is a kind of scanning probe microscopy (SPM) that has been shown to have resolution on the scale of fractions of a nanometer, which is more than 1000 times higher than the optical diffraction limit.
Hence option (B) is correct.

Note:
One technique is to explain how an instrument interacts with a sample and produces pictures, such as transmitting a beam of light or electrons through a sample along its optical path, detecting photon emissions from a sample, or scanning over and a short distance from the surface of a sample with a probe. The optical microscope, which employs lenses to refract visible light that passes through a thinly sectioned material to generate a viewable picture, is the most common (and the first to be invented).