Part A Scientists use laser range-finding to measure the distance to the moon with great accuracy. A brief laser pulse is fired at the moon, then the time interval is measured until the echo is seen by a telescope. A laser beam spreads out as it travels because it diffracts through a circular extasit leaves the laser. In order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 10 km in diameter Staying vnthin this diameter is accomplished by using a special large-diameter laser A = 545 mm, what is the minimum diameter of the circular opening from which the laser beam emerges? The earth-moon distance is 384.000 km Express your answer with the appropriate units. 32 D- Value Units Submit Request Answer Red Provide Feedback ODEN