P. 3822. The DLP chip (Digital Light Processor), developed by Texas Instruments, is a new display solution used in modern projectors. Peter heard that the chip contains millions of hinge-mounted microscopic mirrors, and all of them can be tilted (separately) into two positions (even 5000 times in a second) reflecting or not reflecting light onto the screen. He lighted the rectangular chip of sides 17 mm and 9.5 mm nearly perpendicularly by a laser beam of wavelength 633 nm. He observed that the reflected laser light formed a diffraction pattern of a grid of squares with 2.4 cm long sides on a screen 50 cm from the chip. Using these data find the length of the sides and the number of the micromirrors in the chip.