What inspired bridget riley to do optical art

Most rules and tapes are marked in increments of inches to lay out joists, studs, and rafters. a. 8 and 10 b. 26 c. 30 d. 12 and 16

What is the english artist and critic roger fry famous for

Which clef would be used for the violin? a. treble b. tenor c. bass d. alto what causes sound? a. electric fields b. magnetic fields c. vibrating electrons d. vibrating molecules