Which one of the following statements is not true

Options

A. Immersion oil increases the refractive index
B. Fluorescent microscopy uses the normal light to view molecules
C. The electron microscope has only electromagnetic lenses
D. Scanning tunneling microscope is useful in scanning computer chips for defects

Answer

B

Explanation

Fluorescence microscope light source is xenon arc lamp or mercury vapor lamp that generate bright spectral bands within the visible wavelength.