Explore BrainMass


Problems with Optics and Lenses

Hi. Can someone please show me how to do the following problem? Thank you. "A magnifying glass is a single convex lens with a focal length of f = +11.0 cm. (Assume the person using the magnifying glass has a near point of 25 cm and the magnifying glass is directly in front of the person's eyes.) (a) What is the angular mag

Optics and Lenses

Hi. can someone please show me how to do the following problem? Thank you. "With unaided vision, a librarian can focus only on objects that lie at distances between 6.0 m and 0.37 m. Find the refractive power needed for each part of the bifocal eyeglass lenses (1. for the converging lens and 2. for the diverging lens) that wi

Optics and Diffraction Problem Set

1) The drawing shows a crystalline slab (n = 1.402) with a rectangular cross section. A ray of light strikes the slab at an incident angle of theta_1 = 44 degree, enters the slab, and travels to point P. This slab is surrounded by a fluid with a refractive index n. What is the maximum value of n such that total internal reflecti


An electron is placed in a constant electric field of magnitude 800 N/C. What is the acceleration of the electron and the electromagnetic power radiated by the electron? I'm not sure how to set it up. Can you help?

Optics - Radiation Intensity

A laser can be used to suspend beads in the earth's gravitational field. A bead with mass 5 * 10^-6 g and density of .400 g/cm^3 is to be suspended. Determine the radiation intensity needed to support the bead. I'm not sure how to set it up. Help please?

Wave Optics: Interference and Diffraction

1.A circular diffraction pattern is formed on a faraway screen. (a) By what factor will the width of the central maximum change if the wavelength is doubled? (a) 4 (b) 2 (c) 1 (no change) (d) 1/2 (e) 1/4 (b) By what factor will the area of the central maximum change if the slit

Optics: Point of Refraction

Given a hemisphere of radius r defined by: x = r*cos(a) y = r*sin(a) where -pi/2 <= a <= pi/2 If the hemisphere describes a boundary between two interfaces having indices of refraction n (outside the hemisphere) and m (inside the hemisphere) and assuming the light strikes the hemisphere at point {x,y} with angle a (meanin

Please, show me how you got the answers and give me the answers. Thanks

1. Light with a wavelength of 486 nm in air is passed through glass with an index of refraction of 1.54. (a) What is the wavelength of the light in the glass? What is the frequency of the light (b) in air and (c) in the glass? 2. Using Huygens' principle (rather than Snell's law), find the angle of refraction when light is in

Optics and Eyeglasses

1. A eyeglass lens has strength of +5.50 diopters. What is the focal length of the lens? 2. A farsighted eye has a near point of 150 cm. Objects closer than 150 cm are not seen clearly. A converging lens is used to permit clear vision of a book placed 25 cm in front of the eye. Find the focal length of the lens and express its

Electronic and Optoelectronic Devices

1. A microscope has an objective with f = 1 cm, an ocular with f = 2.5 cm, and a distance s = 10 cm between them. Taking the best viewing distance as 25 cm, a) Find the magnification of a microscope b) Plot the picture of the rays to scale using the graph paper. 2. Model a parabolic graded-index fibre with n (r) = n 1 [1-(r

Geometrical Optics (Reflection of Light)

Standing 2.0 m in front of a small vertical mirror, you see the reflection of your belt buckle, which is 0.70 m below your eyes. What is the vertical location of the mirror relative to the level of your eyes and what angle do your eyes make with the horizontal when you look at the buckle? If you now move backward until you are

Form images with a plane mirror; minimum height of mirror

You are 1.8 m tall and stand 3.0 m from a plane mirror that extends vertically upward from the floor. On the floor 1.5 m in front of the mirror is a small table, 0.80 m high. What is the minimum height the mirror must have for you to be able to see the top of the table in the mirror? Please include what law is used to solve.

Application of the lens formula

A slide projector produces a 500 times enlarged image of a slide on a screen 10m away. If the screen is moved 2m closer, by what distance should the slide be moved towards or away from the lens so that the image remains focused on the screen? What is the magnification in this case? Assume that the projector consists of a single

Apparent depth due to refractive index change

A beaker contains water up to height of H1 and K-oil above water up to another height H2. Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is n1 and that of kerosene is n2.

Physical Optics First Order Maximums

Multiple choice: 1. The middle of the first-order maximum, adjacent to the central bright fringe in the double-slit experiment, corresponds to at a point where the optical path length difference from the tow apertures is equal to: (a) h (=lander) (b) 0 (c) 1/2h (d) 1/4h (e) none of the above. Explain your choice. 2. A narrow

Physical optics

In an experiment where you light a long filament vertical light bulb. If you look at it from several meters away through a vertical slit cut in a 3 X 5 card, you will see a lovely fringe system. Explain what's happening. Multiple choice: 1. Light linearly polarized in the plane-of-incidence impinges on the surface of a glass

Physical Optics are examined.

Q: If you put a few drops of liquid in a cup of soap with a little water and shake it around, making a great froth of bubbles. After several seconds, the bubbles will begin to show bright rainbow color patterns. Why must you wait before the colors appear? Q: If you take a very close look at a worn surface under direct sunligh

Optics and Image Determination

1. A point source of light lies on the central axis of a bi-convex spherical lends who radii of curvature are both measured to be 19.4 cm. The lens is made up of glass with an index of refraction of 1.50 and the source is 3.17 meters to the left of it. What is the image distance (in meters)? 2. A grasshopper sitting 31.4 cm t