Equal wavelength waves of amplitude 0.25 m and 0.10 m interfere with one another. What is the resulting minimum amplitude that can result?
a. 0.15 m
c. 0 m
b. 0.10 m
d. –0.40 m
A
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In what way is electric charge related to photons?
A) Photons are electrically-charged particles. B) They are not related at all. C) Electrically-charged particles interact by exchanging photons. D) Photons interact by exchanging electrically-charged particles. E) Electrically-charged particles are made of photons.
A glass plate having an index of refraction is 1.66 is immersed in a certain alcohol. The surface of the glass is inclined at an angle of 44° with the vertical
When a horizontal ray in the glass strikes the interface, you observe that it is at the critical angle. What is the index of refraction of the alcohol? A) 1.15 B) 1.13 C) 1.11 D) 1.09 E) 1.17
If the absolute magnitude, M, of a supernova is x 19 and a galaxy is found that contains a supernova with an apparent magnitude, m, of 16 . What is the distance to the galaxy? Hint: dpc = 10(m - M + 5)/5 using a scientific calculator
a. 100 AU b. 100 pc c. 100 ly d. 100 kpc e. 100 Mpc
According to general relativity, what is a black hole?
A) a hole in the observable universe B) an object that cannot be seen C) a place where light travels slower than the normal speed of light D) a place where the strength of gravity is infinite