. Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.?

Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity

Open App

Class 12 Exam > Class 12 Questions > . Electron microscope has a high resolution p...

Join the Discussion on the App

. Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.?

Join for Free

Join for Free

Most Upvoted Answer

. Electron microscope has a high resolution power. This is due to (a) ...

Electron microscope resolution power:
- Electromagnetic lenses: Electron microscopes use electromagnetic lenses to focus the electron beam. These lenses have a higher resolving power compared to glass lenses used in light microscopes, allowing for higher magnification and resolution.
- Very low wavelength of electron beam: The wavelength of electrons used in electron microscopes is much shorter than that of visible light used in light microscopes. This shorter wavelength allows for higher resolution imaging of smaller structures.
- Low wavelength of light source used: Unlike light microscopes that use visible light with longer wavelengths, electron microscopes use electrons with wavelengths on the order of picometers. This low wavelength contributes to the high resolution power of electron microscopes.
- High numerical aperture of glass lenses used: While glass lenses used in light microscopes do have a numerical aperture that affects resolution, it is not the main factor contributing to the high resolution power of electron microscopes. The combination of electromagnetic lenses and the low wavelength of the electron beam play a more significant role in achieving high resolution in electron microscopy.

Community Answer

. Electron microscope has a high resolution power. This is due to (a) ...

(B)

Share via Whatsapp

View all answers Start learning for free

Explore Courses for Class 12 exam

Similar Class 12 Doubts

Read the following text and answer the following questions on the basis of the same:Electron Microscope Electron microscopes use electrons to illuminate a sample. In Transmission Electron Microscopy (TEM), electrons pass through the sample and illuminate film or a digital camera.Resolution in microscopy is limited to about half of the wavelength of the illumination source used to image the sample. Using visible light the best resolution that can be achieved by microscopes is about ~200 nm. Louis de Broglie showed that every particle or matter propagates like a wave. The wavelength of propagating electrons at a given accelerating voltage can be determined byThus, the wavelength of electrons is calculated to be 3.88 pm when the microscope is operated at 100 keV, 2. 74 pm at 200 keV and 2.24 pm at 300 keV. However, because the velocities of electrons in an electron microscope reach about 70% the speed of light with an accelerating voltage of 200 keV, there are relativistic effects on these electrons. Due to this effect, the wavelength at 100 keV, 200 keV and 300 keV in electron microscopes is 3.70 pm, 2.51 pm and 1.96 pm, respectively.Anyhow, the wavelength of electrons is much smaller than that of photons (2.5 pm at 200 keV). Thus if electron wave is used to illuminate the sample, the resolution of an electron microscope theoretically becomes unlimited. Practically, the resolution is limited to ~0.1 nm due to the objective lens system in electron microscopes. Thus, electron microscopy can resolve subcellular structures that could not be visualized using standard fluorescences microscopy.Q. As the accelerating voltage increases, the wavelength of electron as wave

View answer

Read the following text and answer the following questions on the basis of the same:Electron Microscope Electron microscopes use electrons to illuminate a sample. In Transmission Electron Microscopy (TEM), electrons pass through the sample and illuminate film or a digital camera.Resolution in microscopy is limited to about half of the wavelength of the illumination source used to image the sample. Using visible light the best resolution that can be achieved by microscopes is about ~200 nm. Louis de Broglie showed that every particle or matter propagates like a wave. The wavelength of propagating electrons at a given accelerating voltage can be determined byThus, the wavelength of electrons is calculated to be 3.88 pm when the microscope is operated at 100 keV, 2. 74 pm at 200 keV and 2.24 pm at 300 keV. However, because the velocities of electrons in an electron microscope reach about 70% the speed of light with an accelerating voltage of 200 keV, there are relativistic effects on these electrons. Due to this effect, the wavelength at 100 keV, 200 keV and 300 keV in electron microscopes is 3.70 pm, 2.51 pm and 1.96 pm, respectively.Anyhow, the wavelength of electrons is much smaller than that of photons (2.5 pm at 200 keV). Thus if electron wave is used to illuminate the sample, the resolution of an electron microscope theoretically becomes unlimited. Practically, the resolution is limited to ~0.1 nm due to the objective lens system in electron microscopes. Thus, electron microscopy can resolve subcellular structures that could not be visualized using standard fluorescences microscopy.Q. Why electron as wave is used in electron microscope to illuminate the sample?

View answer

Read the following text and answer the following questions on the basis of the same:Electron Microscope Electron microscopes use electrons to illuminate a sample. In Transmission Electron Microscopy (TEM), electrons pass through the sample and illuminate film or a digital camera.Resolution in microscopy is limited to about half of the wavelength of the illumination source used to image the sample. Using visible light the best resolution that can be achieved by microscopes is about ~200 nm. Louis de Broglie showed that every particle or matter propagates like a wave. The wavelength of propagating electrons at a given accelerating voltage can be determined byThus, the wavelength of electrons is calculated to be 3.88 pm when the microscope is operated at 100 keV, 2. 74 pm at 200 keV and 2.24 pm at 300 keV. However, because the velocities of electrons in an electron microscope reach about 70% the speed of light with an accelerating voltage of 200 keV, there are relativistic effects on these electrons. Due to this effect, the wavelength at 100 keV, 200 keV and 300 keV in electron microscopes is 3.70 pm, 2.51 pm and 1.96 pm, respectively.Anyhow, the wavelength of electrons is much smaller than that of photons (2.5 pm at 200 keV). Thus if electron wave is used to illuminate the sample, the resolution of an electron microscope theoretically becomes unlimited. Practically, the resolution is limited to ~0.1 nm due to the objective lens system in electron microscopes. Thus, electron microscopy can resolve subcellular structures that could not be visualized using standard fluorescences microscopy.Q. In electron microscope, electron is used

View answer

Read the following text and answer the following questions on the basis of the same:Electron Microscope Electron microscopes use electrons to illuminate a sample. In Transmission Electron Microscopy (TEM), electrons pass through the sample and illuminate film or a digital camera.Resolution in microscopy is limited to about half of the wavelength of the illumination source used to image the sample. Using visible light the best resolution that can be achieved by microscopes is about ~200 nm. Louis de Broglie showed that every particle or matter propagates like a wave. The wavelength of propagating electrons at a given accelerating voltage can be determined byThus, the wavelength of electrons is calculated to be 3.88 pm when the microscope is operated at 100 keV, 2. 74 pm at 200 keV and 2.24 pm at 300 keV. However, because the velocities of electrons in an electron microscope reach about 70% the speed of light with an accelerating voltage of 200 keV, there are relativistic effects on these electrons. Due to this effect, the wavelength at 100 keV, 200 keV and 300 keV in electron microscopes is 3.70 pm, 2.51 pm and 1.96 pm, respectively.Anyhow, the wavelength of electrons is much smaller than that of photons (2.5 pm at 200 keV). Thus if electron wave is used to illuminate the sample, the resolution of an electron microscope theoretically becomes unlimited. Practically, the resolution is limited to ~0.1 nm due to the objective lens system in electron microscopes. Thus, electron microscopy can resolve subcellular structures that could not be visualized using standard fluorescences microscopy.Q. Who showed that electron also propagates like a wave?

View answer

Read the following text and answer the following questions on the basis of the same:Laser:Electromagnetic radiation is a natural phenomenon found in almost all areas of daily life, from radio waves to sunlight to x-rays. Laser radiation – like all light – is also a form of electromagnetic radiation. Electromagnetic radiation that has a wavelength between 380 nm and 780 nm is visible to the human eye and is commonly referred to as light. At wavelengths longer than 780 nm, optical radiation is termed infrared (IR) and is invisible to the eye. At wavelengths shorter than 380 nm, optical radiation is termed ultraviolet (UV) and is also invisible to the eye. The term “laser light” refers to a much broader range of the electromagnetic spectrum that just the visible spectrum, anything between 150 nm up to 11000 nm (i.e. from the UV up to the far IR). The term laser is an acronym which stands for “light amplification by stimulated emission of radiation”.Einstein explained the stimulated emission. In an atom, an electron may move to a higher energy level by absorbing a photon. When the electron comes back to the lower energy level it releases the same photon. This is called spontaneous emission. This may also so happen that the excited electron absorbs another photon , releases two photons and returns to the lower energy state. This is known as stimulated emission.Laser emission is therefore a light emission whose energy is used, in lithotripsy, for targeting and ablating the stone inside the human body organ.Apart from medical usage, laser is used for optical disk drives, printers, barcode readers, etc.Q. The “stimulated emission” is the process of

View answer

Share with a Friend

Answer this doubt

Question Description
. Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.?.

Solutions for . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.

Here you can find the meaning of . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? defined & explained in the simplest way possible. Besides giving the explanation of . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.?, a detailed solution for . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? has been provided alongside types of . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? theory, EduRev gives you an ample number of questions to practice . Electron microscope has a high resolution power. This is due to (a) Electromagnetic lenses (b) Very low wavelength of electron beam (c) Low wavelength of light source used (d) High numerical aperture of glass lenses used.? tests, examples and also practice Class 12 tests.

Explore Courses for Class 12 exam