In the early part of the 1900s, psychologists who broke down thought processes into their basic elements and analyzed them were called structuralists. What term might we use to describe psychologists with similar interests today?
Behavioral
Cognitive
Gestalt
Humanistic
Social

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 exit as it 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 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , 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 to two significant figures and include the appropriate units.

Describe the path of a ray that approaches a mirror parallel to the principal axis.

What’s #16 asking me and how do i solve it?