The semimajor axis of an ellipse is
a. the ratio of the longest diameter of the ellipse to that of the shortest diameter of the ellipse.
b. half the length of the shortest diameter of the ellipse.
c. half the length of the longest diameter of the ellipse.
d. the distance between the two foci of the ellipse.
e. the ratio of the distance between the two foci to the length of half the longest diameter of the ellipse.
c
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At what angle will the highest-order maximum appear for a wavelength of 412 nm using a grating with 435 lines per mm?
a. 46° b. 64° c. 1.1° d. 68° e. 90°
Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth. Hans is holding a pencil at an angle of 30° with the direction of travel, as seen by Hans
What angle does the pencil make with the direction of travel, as seen by Brian on Earth? A) 29° B) 30° C) 31° D) 33° E) 90°
The observation of the moons of Jupiter by Galileo Galilei suggested that:
A) Earth could not move as its moon would be left behind. B) the Solar System was actually geocentric. C) Earth could move and keep its moon. D) the only center of motion was Earth.
A larger telescope will always have a higher spectral resolution than a smaller telescope when observing at the same wavelength
Indicate whether the statement is true or false