When the primary beam passes through the body, some of the radiation is absorbed in a process known as attenuation.

The observer would alter the brightness of each of the three primary beams until a match to the test color was observed.

It is necessary to ensure that the sample is sufficiently thick to absorb the entire primary beam.

Just as she was, with no dolling up at all, she'd be a primary beam on any man's planet.

First, that you try everything else before you use this primary beam.

Also, we have heard that you have an unusually hot battery of primary beams.

Her primary beams sliced into and through one of the aliens' mobile moons.

The same can be said of the variations on the primary beam that have come in since the new screens reduced the laser's effectiveness.

Four primary beams lashed out, slender daggers of nearly unstoppable energy.

In both techniques, it is not the primary beam, but secondary electrons which cause the deposition.