A concave mirror is placed in water . will there be changed in focal length? give reason?
537574
no, the focal lenght is the property of the mirror, not of the medium in what is situated.\nthe focal lenght = mirror radius / 2
922899
Points to consider:\nFocal distance of mirror.\nMirror type: Flat, concave and convex.\nReflected index of silver coating.\nMagnification of image.\nGlass type.\nGlass colour.\nThickness of glass used.
156975
I will not do your homework for tou.\n\nDo a Google search on "refractive index" for both water and diamond. There is your answer.\n\n Come back if you have any points you don't understand. Asking other people to do your homework is not just dishonest and lazy it is really stupid.
812420
if u can trap light in a totally reflective mirror(means which reflect light 100%) and don't make any HOLE in ball it definitely keep on reflecting.\nif mirror is not 100% reflecting it will absorb some portion of light every time light fell on its surface.So after some time light rays will vanish practically.(theoretically light rays will vanish after infinite time)\n \nif yr mirror ball has a hole then there is a probability that light will come out of mirror ball in its journey.\npractically this situation is not possible bcos either second or third situation always applies.
694338
Yes, it does, this is due to refraction, which is the bending of light. Images in water always appears nearer, and thus seems larger! n_n
757540
The equation which relates the object distance (Do), the image distance (Di), and the focal length (f) of the mirror is\n\n1/Do + 1/Di = 1/f\n\nSolving for the image distance\n\nDi = 1/(1/f - 1/Do) = f*Do/(Do - f)\n\nFor this case, the image will be minified and inverted. FYI, the magnification is given by M = -Di/Do, where a negative value indicates and inverted image. These results can be verified through ray tracing.
1122883
A white object spreads the light into many directions. A mirror doesn't, it instead keeps the light focused, which is why we can see our images.
593131
The incident ray is perpendicular to the surface of reflection.\nThen one has the least distance case.
8756
Unless the reflective surface is perfect (which is impossible in the real world) the light will loose a little energy with each reflection (the mirror will heat up a little), and in a very short time the light will just get redder until it is merged into whatever infrared energy is inside the sphere.
968157
I would also pick A as the correct answer.\n\nB. the camera might or might not have to be adjusted depending on how much light is being reflected into the picture.\n\nC. A reflector may or may not prevent one side othe image from appearing lighter or darker depending on the actual lighting of the scene.\n\nD. because B & C are not right
791236
1)Yes, if u change the property of that medium, by adding glycerine in water, or... etc. then the angle of refration would reverse out...  or depending what u want to attain...\n\n2)The velocity increases, due to the fact that the WAVELENGTH increases.\n\n3) There will be total reflection, no refraction above the glass will be seen\n\n4) to get better shine / reflection in stone -  \ntry to measure reflection off marine or other food (spoilage) -\nEPA can do the same with GAs refration,  eyc\n\n5)Fiber Optics communication,, Electro-Optic modulators,, Wave Scattering phenomenon/research   etc
946998
since its a concave mirror, f = -31.6 cm\nlet object position be u and image position v\n\nmagnifivation m = - v/u = h'/h      h is abject size n h' image size\nresulting image is uprigth so h' is +ve and is 6h\n- v/u = 6 or v = -6u\nby mirror formula 1/v+1/u=1/f\n1/u = 1/f-1/v\n1/u = 1/f + 1/6u\n5/(6u) = 1/f\nu = f * 5/6\nu = 31.6 * 5/6\nu= 26.3 cm(approx)\nits kept at a distance 26.3 cm from the pole of the concave mirror.
1030622
If you look at a painting from 3 inches away, it will be clear, but a mirror is not in fact a flat image like a painting.  The light in the mirror comes from the surroundings, so, depending on the distance between an object and the mirror, the light travels different distances.  Try standing in front of the mirror and covering one eye-- what you see, in the mirror or not, will be flat.  Uncover the eye and you will have depth perception even when you look in the mirror.
1002470
i would think the light would reflect with more of a wave length...but that is just a guess...kinda like a magnifing glass...\n\nNice to see you've corrected the spelling mistake in your 'nickname'\nLAST TIME I EXPLAIN MYSELF...WHEN I FIRST WROTE MY NICK NAME IT WAS FOR THE NEWS DISSCUSSION BOARDS....I TRIED SPELLING IT proudcaucasian FIRST BUT IT WAS ALREADY TOOK...SO I WENT WITH proudcaucasiOn!!!   i didnt think i would run into any dumbass who thought they were the grammer police and couldnt figure out what it meant...just goes to show you how many idiots are here in y!answers...  got it now tomika???   hope so cause i wont explain it ever again!!!   loooooooser
44487
Something is wrong with this question. I see it is 2 months old and would write directly if you allow email.\nI think the question should be about the object not the image. If the object is at the focal length of the lens, then the rays are parallel and easy to see with the eyes. The only image is on the inside of the eye.\nIt doesn't make sense to have length anywhere.
1151441
#1: It doesn't. The frequency of a beam of light remains constant regardless of the medium through which it travels, although the wavelength may change.\n#2: Absolutely nothing, for the same reason as #1.\n#3: Not for a mirror. The focal length of a mirror is determined by reflection, not refraction, and the angle of reflection is equal to the angle of incidence, regardless of the medium.\n#4: 1:1. The velocity of light does not depend on wavelength*\n\n*okay, for some materials the index of refraction, and therefore the speed of light in that material, depends slightly on wavelength, which is why a prism can be used to separate light into its various colors. However, the question did not specify a particular medium, so I assumed it meant in vacuum, where the velocities of all light rays are indeed the same.
763008
A focal length, in a lens or mirror, is the distance from the lens to the focal point (the point where all rays converge from being directed by the lens).