CHM3402_Revisions_Other spectroscopic techniques

Which of the following is the primary difference between SEM and TEM?

• SEM uses light while TEM uses electrons

• SEM provides 2D images, TEM provides 3D images

• SEM scans the surface; TEM transmits electrons through the specimen

• TEM uses X-rays; SEM uses visible rays

In SEM, what type of electrons are mainly used to form the image?

• Transmitted electrons and inelastic scattering

• Backscattered electrons and secondary electrons

• Auger electrons and backscattered electron

• Characteristic X-rays

What kind of sample preparation is typically required for TEM compared to SEM?

• Coating with gold only

• No sample preparation needed

• Thin sectioning can be up to 500 nm for TEM samples but SEM sample must be thin

• Thin sectioning for TEM sample cannot be thicker than 200 nm

Which technique typically requires a vacuum environment for imaging?

• Light microscopy only

• Both SEM and TEM

• TEM only

• SEM only

Which microscopy technique is better suited for imaging internal structures at atomic resolution?

• SEM

• TEM

• XPS

• EDX

What type of image is typically produced by a TEM?

• 3D surface topography

• Depth profile

• 2D internal structural image

• Color-enhanced micrograph

Which of the following signals is NOT used in TEM but is common in SEM?

• Secondary electrons

• Transmitted electrons

• Electron diffraction

• elastic scattering electron

Which technique is more suitable for viewing surface morphology?

• X-ray image

• TEM

• Light microscopy

• SEM

What is the primary purpose of using EDX in SEM or TEM?

• To obtain high-resolution images

• To analyze the crystal structure

• To measure the sample's thickness

• To identify the elemental composition of a sample

In which instrument is EDX more commonly used due to ease of sample handling and setup?

• TEM

• SEM

• XRD

• Raman