Ultraviolet Lens information and auctions!

April 2, 2011 lenses No comments

At $18 (when I got it), it was a good price and has worked out great on my Canon 70-200 f/4 IS. No complaints.

Help answer the question about Ultraviolet Lens
I NEED ANSWERS PLEASE!!!!!?
SOME MIGHT BE HARD WITHOUT DIAGRAMS BECAUSE THEY WON'T LET ME PASTE DIAGRAMS, BUT DO WHAT YOU CAN DO THANNNK YOU!!!12.Which of the following statements is true for a diverging lens?a.It will produce a real and virtual imageb.It will only produce a real imagec.It will only produce a virtual imaged.The image is always bigger than the object13.A man shines a flashlight underwater at the surface of the water such that all the light is reflected back down. This is an example ofa.total internal reflectionb.refractionc.dispersiond.scattering14.An object is placed 2 m in front of a converging lens with a focal length of 0.5 m. Where is the image located?a.0.5 mb.1.0 mc.1.5 md.2.0 m15.A ray passing through the center of a lens willa.reflect back towards the sourceb.continue moving in a straight pathc.bend towards the normal lined.bend away from the normal line16.According to the rules for a ray diagram of a mirror, ray 3 will alwaysa.be parallel to the principle axisb.pass through the center of the lensc.pass through the focal pointd.pass through the center of curvature17.All of the following are examples of complimentary colors excepta.yellow and cyanb.blue and yellowc.red and cyan d.magenta and green18.An object is placed on the axis of a converging lens of focal length 2 cm, at a distance of 8 cm from the lens. the distance between the image and the lens is most nearlya.0.8 cmb.1.6 cmc.2.0 cmd.2.7 cm19.The Lensmaker equation relates thea.distance of the object with the radius of curvatureb.distance Ultraviolet Lens of the image with the radius of curvaturec.focal length with the radius of curvatured.focal length with the distance to the image 20.The pupil is black so thata.we can see in colorb.it can bend the light towards the center of the retinac.it can absorb all the light that hits itd.it can reflect all the light that hits it 21.A light ray passes through substances 1, 2 and 3. Ray segments in 1 and 3 are parallel. From the directions of the ray, one can conclude thata.n3 must be the same as n1b.n2 must be less than n1c.n2 must be less than n3d.n1 must be equal to 1.0022.A 1.50 cm high diamond ring is placed 20.0 cm from a concave mirror whose radius of curvature is 30.0 cm. Determine (a) the position of the image.a.20 cmb.30 cm c.45 cmd.60 cm23.Snell’s law created an analytical relationship between thea.angle of incidence and angle of reflectionb.angle of incidence and angle of refractionc.angle of reflection and angle of refractiond.critical angle and angle of reflection24.Which of the following has the greatest wavelength?a.radio waves b.infrared wavesc.x-raysd.ultraviolet waves25.If the object distance for a converging lens is more than twice the focal length of the lens, the image isa.virtual and erectb.larger than the objectc.located inside the focal pointd.located at a distance between f and 2f from the lens26.Diffuse reflection is when lighta.passes from one medium to anotherb.experiences total internal reflectionc.reflects off a rough surfaced.reflects off a smooth surface27.Which of the following is true for a real image?a.It can never be seenb.It can only be seen when it is projected onto somethingc.It can only be seen with special glassesd.It cannot be projected on a screen28.A convex meniscus lens is made from glass with n = 1.50. The radius of curvature of the convex surface is 15 cm and that of the concave surface is 32 cm. The focal length is nearlya.56 cmb.24 cmc.16 cmd.72 cm29.The retina is very similar to what part of a camera?a.lensb.shutterc.cased.film30.Which three of the glass lenses above, when placed in air, will cause parallel rays of light to converge?a.I, II and IIIb.I, III and Vc.I, IV and Vd.II, III and IV31.A diverging lens will always produce a real image.a.trueb.false32.An object gets its color from the color of light that hits it.a.trueb.false33.The greater the curvature of a lens, the shorter the focal length.a.trueb.false34.A convex mirror will always produce a virtual image.a.trueb.false35.The total magnification for more than one lens is the sum of magnification of each lens.a.trueb.false36.Nearsightedness refers to an eye that can only focus on nearby objects.a.trueb.false37.Farsightedness is cause by an eye that is too long.a.trueb.false38.In an eyeball, the lens does most of the bending of light.a.trueb.false39.When light goes from a low index of refraction to a high index of refraction it will bend towards the normal line.a.trueb.false40.One reason we know that light travels in a straight path is through the formation of shadows.a.trueb.false