Abeam of light has a wavelength of 4.5 × 10^−7
meter in a vacuum. the frequency of this light is
(1) 1.5 × 10^−15 hz (3) 1.4 × 10^2 hz
(2) 4.5 × 10^−7 hz (4) 6.7 × 10^14 hz

Wavelength formula is C=λf or λ=C/f or f = C/λ, so Frequency = Velocity divided by wavelength, where C is the velocity, which is the speed of light: 3.00×108 m/sec

λ is the wavelength in meters
f is the frequency in Hertz (cycles per second)
f=3.00×108msec/4.5x10−7m=6.7x1014Hz

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jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.