wavelength of a light wave?

Question

if we somehow increased the wavelength of a light wave by 10times , how would the frequency , energy and the speed of the wave change ,(increase ,decrease or stay the same) &
by how much

Answer 1

V = n. lambda where n is the frequency and lambda (the greek L) is the wave length and V is the velocity. Therefore,

If the wavelength is increased 10 times, the frequency decreases by 10 times, the speed of the wave (velocity is the better word) remains same.

The energy of the wave is reduced 10 times, since energy of a photon (a packet of the light) is Planck's constant X frequency and in our case the frequency is reduced 10 times.

Answer 2

wavelength and frequency are related by an inverse relationship. W=C/F
If you increase the wavelength to 10 times the original wavelength then the frequency becomes one tenth the original frequency. The color of the light would change from the violet toward the red end of the spectrum.

The speed of light is a constant and would not change.

The energy is a little more complex. The energy in each photon would reduce but the number of photons might increase depending on the method used to reduce the wavelength. The total energy could go up, go down or stay the same.

Answer 3

If you increase the wavelength, the frequency should decrease. Imagine a wavelength as a sideways s.
One wave is from the beginning of the s to the end of the s. If you drew it 10x's bigger, then you can fit fewer of them in the same space
hard to type it, but here goes:
sssssss
SSSSS
You see how I can fit 7 small s's in the same space as 5 larger s's? That is the frequency.

Oh, and all light travels at a constant rate (i.e. the speed of light - or C) ;)

Answer 4

The longer the wavelength the lower the frequency and therefore the lower the energy.
Its an inverse relationship, so double the wavelength you halve the frequency. Not completely sure about the energy relationship (you need to do some research on your own).

The speed stays constant regardless of the wavelength or frequency.

Answer 5

If you increase the wavelength, you would decrease the frequency by the same ratio (well, the inverse). The speed of light would not change, and the energy would also decrease.

Answer 6

Electromagnetic Spectrum - Introduction


http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html