Why are the largest visible-light telescopes in the world made with mirrors rather than lenses?

Light distorts through lenses more then it does on mirrors. Images are harder to make out and mirrors are cheaper then all the glass they need for the lenses especially because of contorting the lenses.

Hope this helps!

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

d. air pressure decreases as altitude increases.