In a two-slit experiment, if the wavelength of the incident light increases, the bright and dark lines in the interference pattern

A. are unchanged.
B. spread out.
C. move closer together.
D. disappear.


B. spread out.

Physics & Space Science

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The observed slowing of a clock in the vicinity of a black hole is a prediction of

A) the Roche Limit. B) Special relativity. C) General relativity. D) Stellar nucleosynthesis. E) the Cosmological Principle.

Physics & Space Science

Potassium Iodide (chemical formula: KI) has a face-centered cubic structure (just like sodium chloride). If the distance between crystal planes is d = 0.353 nm and X-rays of wavelength ? = 0.0934 nm are used, what is the smallest angle ? at which a diffraction maximum may be obtained?

A. 9.92° B. 7.60° C. 13.3° D. 15.5° E. 6.52°

Physics & Space Science

How many time constants must elapse if an initially charged capacitor is to discharge 55% of its stored energy through a resistor?

a. 0.60 b. 0.46 c. 0.52 d. 0.40 e. 1.1

Physics & Space Science

Two lenses, the first with focal length -12.5 cm and the second with focal length 20.0 cm, are separated by 15.0 cm. If an object is place 50.0 cm in front of the first lens, where is the final image formed?

A. 10.0 cm before the first lens B. 25.0 cm before the second lens C. 25.0 cm after the second lens D. 50.0 cm after the second lens E. 100 cm after the second lens

Physics & Space Science