Two glass plates, each with an index of refraction of 1.55, are separated by a small distance D. The space between the plates is filled with water (n = 1.33) as shown. What is the minimum thickness of D that will cause the reflected light appear green? Note: The wavelength of green light is 460 nm in vacuum.

The ionization energy for the hydrogen atom is 13.6 eV. What is the energy of a photon that is emitted as a hydrogen atom makes a transition between the n = 4 and n = 3 states?

a. 3.40 eV c. 6.80 eV b. 0.66 eV d. 2.55 eV

Multiple star systems in our galaxy

A) are extremely rare, making up less than 1% of the total B) are very common, making up about 50% of the total C) are fairly common, making up around 30% of the total D) do not exist

If the first maximum of one circular diffraction pattern passes through the center of a second diffraction pattern, the two sources responsible for the pattern will appear to be a single source

Indicate whether the statement is true or false

Huyghens claimed that near the surface of the Earth the velocity downwards of an object released from rest, vy, was directly proportional to the square root of the distance it had fallen, . This is true if c is equal to

A.

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