What problem does adaptive optics correct?Group of answer choicesthe opacity of the earth's atmosphere to some wavelengths of lightthe light pollution of urban areasturbulence in the earth's atmosphere which creates twinklingdefects in the optics of the telescope, such as the original Hubble mirrorchromatic aberration due to use of only a single lens objective

What problem do refractor telescopes have that reflectors don't?Group of answer choiceslight loss from secondary elementsbad seeingchromatic aberrationspherical aberrationdiffraction limited resolution

The spherical aberration of a converging lens can be corrected by reducing the thickness of the lens periphery.  The spherical aberration of the lens is caused because light rays emerging from the lens:A.are insufficiently refracted at the lens periphery.B.converge at the lens focal point uniformly.C.are excessively refracted at the lens periphery.D.are scattered due to chromatic dispersion.

In astronomy, an interferometer can be used toGroup of answer choicesspeed up the processing of CCD imagesyield better seeing conditions with optical telescopesimprove the angular resolution of radio telescopesincrease the sensitivity of infrared telescopes to longer wavelengthsdecrease the effects of light pollution in getting darker sky backgrounds

One advantage of the Hubble Space telescope over ground based ones is thatGroup of answer choicesit is larger than any Earth-based scopes.its adaptive optics controls atmospheric blurring better.it can better focus x-ray images.in orbit, it can operate close to its diffraction limit at visible wavelengths.it can make better observations of the ozone layer.

The phenomenon of “chromatic aberration” leads to