Question

The longest wavelength of light in the visible spectrum has the color ____________, while the shortest wavelength of light in the visible spectrum has the color _____________.

(A.) red, violet

(B.) orange, green

(C.) violet, red

(D.) green, orange

Answer 1

A

Answer 2

You cannot trust anyone who simply gives the letter as the answer - they may be guessing or just not know what they are talking about.

This question is simply a question of fact, not of understanding or concept.

Just do some simple reading, or google 'visible spectrum' and you can find the answer - probably along with loads more interesting info about light and spectra.....

Answer 3

C... The bigger the wavelength the smaller the frequency hence smaller energy.

Answer 4

@Monpon123

So now you have 2 different answers on a matter of FACT

go and research it from a reliable source

Answer 5

ROYGBIV longer waves have lower frequency so RED for first ___ shorter waves have higher frequency so VIOLET for the second _____

The words ultraviolet and infrared it can make it easier to remember, ultraviolet is above the spectrum of visible light and infrared is below. ultra=above infra=below.

regarding "the smaller the frequency hence smaller energy" FALSE! Think of the energy available at the sun in infrared heat (even lower frequency) then travel out a few billion miles spreading the energy in a spherical pattern \[piR ^{3}\] you can easily imagine that the high-frequency VIOLET light at this distance has less energy than the low-frequency red light near the sun.

As far as @MrNood is concerned he is right, see this http://bit.ly/2hmHd3h :->

Answer 6

@bugman954
I think the key point is the energy per photon - rather than the absolute energy density at any point

The energy of the higher frequencies (Violiet ,ultra-violet .....etc) IS higher than the red/infra red... end of the spectrum

The energy of a photon is given by the equation E = hf, where E is energy, h is Planck's constant, and f is frequency.

Answer 7

@MrNood are you saying that you agree with @Jhulian?

he said "C... The bigger the wavelength the smaller the frequency hence smaller energy."

Theis no mention of per photon etc... in the question.

I believe the answer is (A.) red, violet, and not C as @Jhulian is asserting with his energy argument.

Answer 8

@MrNood thanks for the per photon perspective, it is clear that there are many ways to measure energy.

Answer 9

@bugman954
There are not really many ways of measuring energy. I think you should look at the spectrum of the sun the intensity we feel as heat is just because those wavelengths penetrate our atmosphere.

There is no mention at all of energy in the question

No I don't agree with @jhulian he has the answer the wrong way round - the answer is A since red has longer wavelength and violet has shorter - which is what the question asked.

Answer 10

@MrNood then you agree with me on the answer "(A.) red, violet"

I also appreciate the two mutually inclusive ways energy can be measured which are tangential to the question at hand.

May I repeat; Thanks for the per photon perspective, it is clear that there are many ways to measure energy.