Select the reasons why most professional telescopes are reflectors rather than refractors. A mirror can collect light more efficiently than a lens. Only the front surface of a mirror has to have a precise shape. Lenses are not subject to chromatic aberration. A lens has to be supported only around its edges. Reflecting telescopes have shorter focal lengths than refracting telescopes. It is easier to make a large reflecting telescope than a large refracting telescope.

answer: decibel

explanation:

part 1: describe the mass and the surface temperature of dwarf stars.

part 2: explain using complete sentences where on the hr diagram you would expect to find a dwarf star based on its physical properties.

part 1: the mass of a dwarf star is very small and the surface temperature of dwarf stars are high and they have the lowest absolute brightness.

part 2: on the hr diagram you would expect to find a dwarf star based on its physical properties at an absolute brightness of -2 to -4

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