**Electron Microscope**

The wave nature of electrons is utilized in electron microscopes, making option B the correct answer.

**Explanation:**

An electron microscope is a powerful instrument used to view structures at a very high magnification. It is based on the wave-particle duality of electrons, which means that electrons have both particle-like and wave-like properties.

**Wave-particle duality:**

According to the wave-particle duality principle, all particles have wave-like characteristics associated with them. This means that particles, including electrons, can exhibit wave-like properties such as diffraction and interference.

**Electron waves:**

Electrons, like other particles, can be described by a wavefunction, which represents the probability amplitude of finding the electron at a particular location. The wavefunction of an electron can be thought of as a standing wave, similar to the waves on a string or in a water tank.

**Electron interference:**

When an electron beam passes through a narrow slit or encounters a crystal lattice, the wave-like nature of electrons leads to interference patterns. These patterns arise from the constructive and destructive interference of electron waves, similar to the interference patterns observed with light waves.

**Electron microscopy:**

In an electron microscope, a beam of electrons is focused onto a specimen, and the resulting interactions with the specimen provide information about its structure. The wave-like nature of electrons allows for higher resolution imaging compared to optical microscopes that use light waves.

**Transmission Electron Microscope (TEM):**

In a transmission electron microscope (TEM), a high-energy electron beam is transmitted through a thin specimen. The electrons interact with the specimen, and the resulting transmitted electrons are collected to form an image. The wave-like nature of electrons allows for the resolution of fine details in the specimen.

**Scanning Electron Microscope (SEM):**

In a scanning electron microscope (SEM), the electron beam is focused to a spot and scanned over the surface of the specimen. The interaction between the electron beam and the specimen produces signals that can be used to generate an image. The wave-like nature of electrons contributes to the high resolution and detailed imaging capabilities of SEMs.

In conclusion, the wave nature of electrons is crucial for the functioning of electron microscopes. The ability to manipulate and control electron waves allows for the high-resolution imaging of specimens in both transmission and scanning electron microscopy.

Obtion B is correct. answer
wave length of electron is applyed on electronmicroscope.