A red laser with a wavelength of 7.00x10^-7 m passes through a diffraction gradient with slits with a 0.30 mm distance. What is the angle
from the central maximum to the first bright spot (m=1)? *
0 0.043 degrees
0 0.13 degrees
O 0.00023 degrees
O 2.5 degrees

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.