A theory cannot be absolutely verified
Indicate whether the statement is true or false
TRUE
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Magnification can be accomplished with a hologram when viewed with light that has a
A) longer wavelength than the original light. B) shorter wavelength than the original light. C) neither for holograms cannot be magnified.
Suppose you know the declination of a bright star that is now crossing your meridian. What else must you measure in order to determine your latitude?
A) the star's altitude B) the apparent solar time C) the current universal time D) the star's right ascension
The following are positioned in sequence: A source of a beam of natural light of intensity I0; three ideal polarizers A, B, and C; and an observer
Polarizer axis angles are measured clockwise from the vertical, from the perspective of the observer. The axis angle of polarizer A is set at 0° (vertical), and the axis angle of polarizer C is set at 50°. Polarizer B is set so that the beam intensity is zero at the observer. Which of the following pairs of angles are possible axis angle settings of polarizer B? A) 40° and 90° B) 40° and 130° C) 40° and 140° D) 90° and 130° E) 90° and 140°
In Joule's paddle-wheel experiment (shown here), why won't the weight rise when we heat the water?
a. The random motion of water molecules hitting both sides of each paddle wheel does not result in a net force on one side of each paddle. b. Energy conservation would be violated because no external force is applied. c. The heat supplied by the flame does not provide sufficient energy to raise the weight.