1. How does the frequency of a beam of ultra violet light change when it goes from air into glass?
2. When light undergoes refraction, what happens to its frequency?
3. A concave mirror is placed in water. Will there be any change in focal length? Give reasons.
4. Give the ratio of velocities of light rays of wavelength 4000^A and 8000^A. (^ means degrees.)
Please answer in full detail.
2006-06-09 03:24:51 · 15 answers · asked by JET 1 in Science & Mathematics ➔ Physics
y dont u do ur homework urself .ok heres abrief intro.
1.see the level of frequency changes when beam of ultra violet light rays enter to one medium from another medium(to glass from air).
2.when light undergoes refraction it frequency changes its speed acc. to the medium such as(glass,air and water)
3.yes there will be,as light enters to one medium from another medium.
2006-06-09 03:45:58 · answer #1 · answered by sur k 3 · 1⤊ 0⤋
1. The change in substance produces a refraction.
2. The different frequencies get divided apart evenly in order of the frequency.
3. Yes, There are three lenses, the water as the beam passes though it the first time, the mirror, and the air as the beam passes into it.
4. I don't know this one.
2006-06-09 03:33:23 · answer #2 · answered by Titainsrule 4 · 0⤊ 0⤋
Answers for you
1.Nothing. No change if the glass is colorless. Frequency= color.
2. Refraction will cause bending of the rays and shortening of the focal length.
3)The ratio is 1, since the velocity of light is constant, independent of wavelength
Your home work done for you!
2006-06-09 05:59:10 · answer #3 · answered by Anonymous · 0⤊ 0⤋
1-2.In any linear process like difraction, refraction and reflection frequency does not change, no matter if its ultraviolet or visible.
3.Law of reflection is independent of the medium but the water it self works has lens with focal leght ifinite.
Some time calculating it is a litle bit trikier but if you have the beginers normal conventions It works how I say it does
4. Where ? in vacuum they are the same its 1 the ratio
2006-06-09 08:02:18 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1. because of refractive index. air is rarer mediumand glass is denser medium . so the the uv light is bends towrads the normal. and also some uv reflected to back. all light rays not enter to tthe another medium. that'swhy we put in mirrors.
2if no reflection frequency not change.
3idontknow
4v=n lamda. 1:2
2006-06-09 05:44:03 · answer #5 · answered by sexguy 1 · 0⤊ 0⤋
You really should do your own homework.
The index of refraction of water and glass is a start. Yes , the angle of any kind of light changes when going from air to water. or glass.
Good luck, I wish I had Yahoo answers when I was in school
2006-06-09 03:28:33 · answer #6 · answered by kurticus1024 7 · 0⤊ 0⤋
1. freq. of uv light won't change. only wavelength & speed of uv light changes on refraction
2. unchanged
3. yes it will decrease
1/f = u{1/r1 - 1/r2}
4.vel is directly proportional to wavelength provided freq. is const.
here both are light rays so freq.=constant
v1/v2 = 4000/8000 =1/2
2006-06-09 08:46:23 · answer #7 · answered by yoovraj s 2 · 0⤊ 0⤋
2.When light undergoes refraction, there is a difference in its frequency.
1.the top answer is the answer for your 1st question.
2006-06-09 03:29:26 · answer #8 · answered by babar 3 · 0⤊ 0⤋
1 no change(only velocity and wavelength changes)
2 no change
3 no it doesnt.changes only for lens
4 velcity proportional to wavelenght.so 1:2
2006-06-09 03:33:27 · answer #9 · answered by manojlds 2 · 0⤊ 0⤋
Dont you have text books to refer? Try Yahoo Encyclopedia! Do your homeowrk yourself!
2006-06-09 03:27:58 · answer #10 · answered by Anonymous · 0⤊ 0⤋