Light spreads out when it passes through a narrow slit because of interference

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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Explain how gravity is used to explain the presence of the tides we experience on Earth

What will be an ideal response?

Physics & Space Science

An aluminum bar (E 5 70 GPa, ? 5 0.33) of diameter 20 mm is stretched by axial forces P, causing its diameter to decrease by 0.022 mm. The load P is approximately:

(A) 73 kN
(B) 100 kN
(C) 140 kN
(D) 339 kN

Physics & Space Science

The graph shows how a star's orbital speed varies with time because of the gravitational tug of an orbiting planet. These data were obtained by measuring

A) the precise wavelengths of spectral lines in the spectrum of the star. B) the precise wavelengths of spectral lines in the spectrum of the orbiting planet. C) the precise brightness of the star divided by the precise brightness of the planet. D) the orbital period of the planet that is orbiting the star.

Physics & Space Science

The spectra of the oldest stars show the most heavy elements

Indicate whether the statement is true or false

Physics & Space Science