Examlex
A ruby laser beam (λ = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
Q2: The ratio of the radius of a
Q8: The total impedance Z of an RLC
Q14: At what frequency should a 200-turn, flat
Q24: An object 15 cm high is placed
Q31: The number of states in the He<sup>+</sup>
Q37: When a neutron decays, a proton and
Q39: Given two non-zero vectors, <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8245/.jpg" alt="Given
Q56: In the operation of a laser<br>A) stimulated
Q60: Refer to Exhibit 5-2. When the elevator
Q61: A thermal neutron has an energy (in