According to the quantum theory of radiation,
A) an electromagnetic field can have only certain values of total energy and no other values.
B) electromagnetic fields are really made of particles.
C) the total quantity of energy that an electromagnetic field can contain must be less than a certain maximum value.
D) radiation goes through only one of the two slits in the double-slit experiment with radiation.
E) electromagnetic fields must vibrate only at one particular frequency.
A
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Resolution: The two stars in a binary star system have an angular separation of 1.0 × 10-5 rad. If the wavelength of the light from the system is 500 nm, what is the smallest diameter aperture telescope that could just resolve this system to show that it contains two stars?
A. 0.50 cm B. 0.61 cm C. 5.0 cm D. 6.1 cm
Which of these is NOT considered a fine example of galactic collisions?
A) the Cartwheel Galaxy B) the Antennae Galaxies C) the Whirlpool Galaxy D) M-31 in Andromeda E) M-87 in Virgo
Phase changes occur with an attendant
A) convection. B) temperature decrease. C) temperature remaining constant. D) temperature increase.
A uniform rod is 3.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest at an angle of 27° above the horizontal. What is the angular speed of the rod as it passes through the horizontal position?
a. 3.0 rad/s b. 2.8 rad/s c. 2.1 rad/s d. 2.5 rad/s e. 3.4 rad/s