1. It would be impossible to build a microscope that could use visible light to see the molecular structure of a crystal because.
(a) Lenses with enough magnification cannot be made.
(b) Lenses cannot be ground with fine enough precision.
(c) Lenses cannot be placed in the correct place with enough precision.
(d) Diffraction limits the resolving power to about the size of the wavelength of the light used.
(e) More than one of the above is correct.
2. Why aren't white-light microscopes made with a magnification of 3000 ×?
(a) Lenses can't be made large enough.
(b) Lenses can't be made small enough.
(c) Lenses can't be made with short enough focal lengths.
(d) Lenses can't be made with long enough focal lengths.
(e) Diffraction limits useful magnification to several times less than this.
3. The resolving power of a microscope is greatest when the object being observed is illuminated by
(a) Ultraviolet light.
(b) Infrared light.
(c) Visible light.
(d) Radio waves.