They usually have about a one degree acceptance angle, meaning once they're more than about a degree off, none of the sunlight rays will hit the focus.

Sunlight is not rich in ultra violet rays, as these have been absorbed by the atmosphere, and it does not produce nearly so large an effect as the arc light.

This equipment uses two types of rays x rays and gamma rays to detect objects such as weapons, bombs and other explosives, and drugs.

X Rays

Gamma Rays

Black Sunlight

In 1876, the German physicist Eugen Goldstein showed that the rays from this glow cast a shadow, and he dubbed the rays cathode rays.

Suddenly, I saw a world that I had never seen before in the ocean schools of fish that were so dense they dulled the penetration of sunlight from the surface, coral reefs that were continuous and solid and colorful, large fish everywhere, manta rays.

It is called sunlight.

Plants need sunlight to grow.

I'll take some X rays of your teeth.

Exposure to sunlight, especially blue light Evidence is conflicting as to whether exposure to sunlight contributes to the development of macular degeneration.

He became an assistant at the school during the period of 1894 97 when he began the study of cathode rays and X rays.

The hills are bathed in sunlight.

When the sunlight is rolled up .

Such equipment, which will be supplied to all remaining border posts in the near future, employs two kinds of rays, namely X rays and gamma rays, and seeks such contraband items as arms, bombs, explosives and narcotic drugs.

Because these latter rays passed through the holes, or channels, in the cathode, Goldstein called them Kanalstrahlen , or canal rays.

He also investigated the light spectra of gases and vapours, worked on the passage of electricity through gases, and discovered new properties of cathode rays (electron rays).

Visibility of standard screens becomes an issue in bright sunlight.

Each of the gamma rays has an energy of 0.511 MeV.

Americans say that sunlight is the best disinfectant.

Many species of sharks and rays inhabit the surrounding body of water.

Monitors won't give you Vitamin D but sunlight will...

Those who live in the dark, are afraid of the sun's rays!!!

Cosmic rays comprise also high energy atomic nuclei, particularly that of iron.

Epsilon rays are a form of particle radiation and are composed of electrons.

He believed the rays to consist of streams of particles of ordinary molecular magnitude.

Human skin naturally produces fumaric acid when exposed to sunlight.

And this shows how I do my process of same size X rays.

Like all X rays, mammograms use doses of ionizing radiation to create images.

The coloring, so coloring adds another level to the X rays.

He observed tubes with energy rays extending from a negative electrode.

The hot diffuse gas in the Local Bubble emits X rays.

These rays produced a fluorescence when they hit the glass walls of the tubes.

Solar radiation management would bounce a little sunlight back into space.

Water heating Solar hot water systems use sunlight to heat water.

It uses the sun's heat without direct sunlight reaching the clothes.

The value of g for diagnostic x rays is only a fraction of a percent.

Because black particles contain soot and absorb sunlight, they are believed to increase global warming. White particles, however, reflect some of the incoming sunlight back into space, producing a cooling effect on Earth s climate.

Small amounts of tritium occur naturally because of the interaction of cosmic rays with atmospheric gases.

They are themselves a cause of further warming ice and snow reflect the sun s rays.

One of these buildings was a dome which allowed the sun's rays to pass through.

In most cases, x rays will be taken of both clavicle bones for comparison purposes.

Compton observed in gamma rays, which do not penetrate the lower atmosphere.

Biomass is any organic material which has stored sunlight in the form of chemical energy.