Exam 3: Light and Telescopes

One technique for the detection of neutrinos from outer space involves the reaction of neutrinos with deuterium in a water tank, with the resulting high-speed electron then generating Cherenkov radiation in the water. How is the Cherenkov radiation produced?

Telescopes are placed in space to view distant galaxies primarily to

A Newtonian reflecting telescope is constructed using a

One nanometer (nm) is

For many years, the Palomar telescope (5-m diameter) in California was the largest telescope in the world; it has now been surpassed by a number of facilities, including both the Keck I and Keck II telescopes (each of diameter 10 m) in Hawaii. How much greater is the light-gathering power of a Keck telescope than that of the Palomar telescope?

If one sends white light through a prism to produce a spectrum, and then sends the red part of that spectrum through a second prism, the result will be

The Lyman-alpha spectral line of hydrogen has a wavelength of 121.6 nm. In which wavelength band does this line occur?

Before 1998, what results were obtained in the detection of solar neutrinos?

An electromagnetic wave has a wavelength of 80 cm. This wave is

How does the angular resolution (sharpness) of the images obtained from radio telescopes using very long baseline interferometry (VLBI) compare to the typical angular resolution of optical telescopes?

Images from the 5-meter telescope at Mount Palomar are not as clear as they were when the telescope was first put into operation over 60 years ago. Why is this?

The main reason that the angular resolution of a 20-m diameter radio telescope is worse than that of a 0.5-m diameter optical telescope is that

Gamma rays are generally absorbed in Earth's atmosphere. However, it is possible to build Earth-based observatories that detect secondary effects of gamma rays, such as the blue light produced when the particles they collide with move faster than the speed of light in air. This blue light is called

The idea that light consists of photons, bundles of pure energy, was first proposed by

A small refracting "spyglass" telescope has an objective lens with a focal length of about 30 inches. The world's largest refracting telescope at Yerkes Observatory has an objective lens with a focal length of 63.5 feet. If they both use the same eyepiece, how much larger is the image with Yerkes than with the spyglass?

X-rays and visible light are

In which wavelength range does the astronomical satellite known as the Compton Observatory observe?

In angstroms (Ǻ), the visible wavelengths of electromagnetic radiation have a range of

In which one of these ranges of the electromagnetic spectrum do photons have the MOST energy?

In the photoelectric effect, a beam of light impinges on a metal, and it is observed that electrons are ejected from the metal in greater numbers as the