By converting the 400 nm wavelength of violet light into meters we are get 4.0.10^-7.
What is wavelength?
Wavelength can be defined as the distance between two successive crests or throughs of a wave. It is measured in the direction of the wave. The wavelength of light defined as the distance between the two successive crests or throughs of the light wave.The wavelength of light is the distance between corresponding point in two adjacent light cycles and the frequency.
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Answer:
13.3 m/s
Explanation:
The motion is a projectile motion. The horizontal distance travelled, called the range, is given by

u is the initial speed,
is the angle with the horizontal and g is acceleration of gravity.
