Indicate true (T) and false (F) statements below regarding electron microscopy. Your answer would be a four-letter string composed of letters T and F only, e.g. FFFF.
( ) Depending on acceleration voltage, the resolution limit of an electron microscope can be as small as 0.05 nm.
( ) The emission gun and the magnetic coils in an electron microscope are analogous to the light source and the glass lenses in a light microscope, respectively.
( ) Contrast in specimens for electron microscopy can be achieved using electron-dense material.
( ) For biological samples, the effective resolution of electron microscopy is about 1 nm.

Question

Indicate true (T) and false (F) statements below regarding electron microscopy. Your answer would be a four-letter string composed of letters T and F only, e.g. FFFF.
( )	Depending on acceleration voltage, the resolution limit of an electron microscope can be as small as 0.05 nm.
( )	The emission gun and the magnetic coils in an electron microscope are analogous to the light source and the glass lenses in a light microscope, respectively.
( )	Contrast in specimens for electron microscopy can be achieved using electron-dense material.
( )	For biological samples, the effective resolution of electron microscopy is about 1 nm.

Quizplus · Accepted Answer

The practical resolving power of an electron microscope can be about 0.05 nm. However, problems in specimen preparation, contrast, and radiation damage can limit the effective resolution to 1 nm for biological samples. Emission gun in electron microscopy is analogous in function to a light source in light microscopy; the magnetic coils focus the electron beams, just as glass lenses focus the light; and the use of electron-dense material to achieve contrast in electron microscopy is similar to the use of light-absorbing dyes in light microscopy.

Indicate True (T) and False (F) Statements Below Regarding Electron