A seventh band covers the spectral region in which heat is emitted by the Earth's surface.

Recording all three spectral regions required making film stock panchromatic to some degree.

Some monochromators have several gratings that can be selected for use in different spectral regions.

Light which is visible to the human eye covers the spectral region from about 400 to 750 nanometers.

The majority of spectrophotometers are used in spectral regions near the visible spectrum.

Like a ghost from spectral regions, a tall figure assumed the shape of a being clad in black.

This spectral region corresponds more or less with the range of light visible to the human eye.

The type of sample container used must allow radiation to pass over the spectral region of interest.

This spectral region can contain about 10% of the total emitted light.

The three ultraviolet filters probe a spectral region that is not observable from the ground.