which of the following choices would be best measured using light years?
A.how long a star will live
B.the wavelength of light
C.the distance from the earth to the moon
D.the distance between two stars

Question

which of the following choices would be best measured using light years?
A.how long a star will live
B.the wavelength of light
C.the distance from the earth to the moon
D.the distance between two stars

anonymous · Answer

I would say c?

jamesj · Answer

First of all, light years is a measure of what?  Time, distance, mass, sweetness, what?

anonymous · Answer

well distance

jamesj · Answer

yes distance.  Hence A is wrong.

Now what is the scale of the wavelength of light?  Big or small?  Tiny, 1/1000000 of a meter
How far is a light year?  Incredibly huge: 9,460,000,000,000 kilometers

jamesj · Answer

How long does it take for light to travel from the earth to the moon?

anonymous · Answer

idk

anonymous · Answer

but it could be earth to the moon

jamesj · Answer

1.5 seconds.

anonymous · Answer

JamesJ it's C right?

jamesj · Answer

1.5 seconds is a tiny, tiny fraction of a year.  Light years don't sound like a g good measure of distance for that to me.

anonymous · Answer

but think about it, the distance between the stars and the distance between the earth and moon. Clearly the distance between the earth and moon is more.

anonymous · Answer

right?

jamesj · Answer

What?!  The nearest star to our sun is 4.2 light years away!

anonymous · Answer

its saying the distance between "two stars"

anonymous · Answer

read it carefully once again*

jamesj · Answer

Yes ... and most stars are light years apart from their nearest neighbor.

jamesj · Answer

just as the sun is 4.2 light years away from its nearest neighbor.

anonymous · Answer

ok i think ur right because i have been thinking about it, but let me verify it.

anonymous · Answer

ok it's D, my bad.

jamesj · Answer

I am right because if stars were that close to each other, our night sky would be incredibly bright as the density of stars would be so much higher.

anonymous · Answer

Yes indeed, sorry I did not research properly and did not have a deep knowledge of it before. Thankyou for ur correction & I have learnt something new myself lol.

jamesj · Answer

back of the envelope, about 100,000,000 times brighter, which would be a lot brighter! ;-)

anonymous · Answer

ok i think she isn't here anyway, so yeh clearly the answer is D.

anonymous · Answer

D.