6. directions: drag each item to the correct location on the diagram. many of the astronomical events that can be witnessed from the earth's surface can be explained by the earth's revolution and its rotation.

which of the following phenomena are best explained by the earth's revolution around the sun, and which are best explained by the earth's rotation along its axis?

which of these go under- earths rotation and which go under- earths revolution

the moon's movement
during one night

changing seasons

a sunrise

the sun's changing
midday height over
several days

passing years

a sunset

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.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

Acar travels 40m in 8 seconds find the car speed