Exam 3: Light and Telescopes

If a laser light pulse was sent toward the Moon and some of this light were to be reflected toward Earth from retroreflectors left on the Moon by astronauts, how long after the transmission of the initial flash would the reflected light be detected through a telescope on Earth?

Which characteristic property of a glass lens is the MOST important in bending light rays to form a focused image?

How can one increase the magnification of a refracting telescope without decreasing the light-gathering power?

What causes chromatic aberration in the objective lens of a telescope?

In a modern neutrino detector, neutrinos

A ray of light enters a spherical lens. The effective focal length of the lens is determined by each of these EXCEPT

In a Cherenkov radiation detector a neutrino

What characteristic of the 10-m Keck telescopes makes them fundamentally different from older telescopes, such as the one on Mount Palomar?

Charge-coupled devices (CCDs) are used in all of these EXCEPT

The first astronomical radio source was detected and identified in the year

A department store sells an "astronomical telescope" with an objective lens of 30-cm focal length and a diameter of 5 cm, and an eyepiece lens of focal length 5 mm and diameter 4 mm. What is the magnifying power of this telescope?

Which of these characteristics of an astronomical telescope is the MOST important for determining the angular resolution?

One major difference between radio waves and light is that

Which of these sequences of electromagnetic radiation is correct, in order of increasing energy of the photons (or quanta)?

How is chromatic aberration MOST often corrected in a modern refracting telescope?

If a person creates a spectrum with a prism as Newton did and then probes the temperature with thermometers that they have kept in the dark, they will find the thermometer will show a temperature rise when placed

The main absorber in the atmosphere for infrared radiation, which impedes observations of astronomical infrared objects, is

The neutrino is

What is the main reason for using several radio telescopes together as an interferometer?

In the 1860s, James Clerk Maxwell carried out important investigations on the nature of light when he