Physics Questions

Object and image for a plane mirror liea. equal distances from the mirrorb. along the same plane.c. at right angles to each other.d. all of thesee. none of these

The magnitude of the focal length of a thin lens is 10.0 cm for red light. Given that the index of refraction for the lens material increases with decreasing wavelength, what is the magnitude of the focal length of the lens for blue light? More than 10 cm Less than 10.0 cm 10 cm That depends on whether the lens is diverging or converging.

Which of the light rays in the figure is drawn incorrectly?Image6.gif e a d c b

Rays that pass through a lens very close to the principle axis are more sharply focused than those that are very far from the axis. This spherical aberration helps us understand why we become more near-sighted as we become older. we can only see in black and white in dim light. we become more far-sighted as we become older. it is easier to read in bright light than it is in dim light.

What is the maximum angle θ such that the light rays will be totally internally reflected assuming that the pipe has an index of refraction of npipe = 1.30 and is surrounded on all sides by air.Image6.gif 50.3o 39.7o 33.8o 56.2o 29.4o

In the figure, assume that R = 4.9 Ω, d = 0.82 m, and a uniform 2.1 T magnetic field is directed into the page. At what speed (in m/s) should the bar be moved to produce 0.56 A in the resistor? bar4.gifEnter a number with one digit behind the decimal point.

Suppose that a microscope has an objective whose focal length is 1.00 mm and an eyepiece whose focal length is 25.0 mm. What is the magnifying power (M)) of the microscope? We need more information to calculate MP. 25X 625X 160X 0.04X

An object is placed at 14.4 cm in front of a diverging lens with a focal length of -19.3 cm. What is the magnification? Enter a number with 2 digits behind the decimal point.

A person's image appears on the far side of an optical instrument, upside down. What is the optical instrument?Image3.jpg A diverging lens A plane mirror A convex mirror A converging lens A concave mirror

A prescription for corrective lenses reads -5 D for each lens. These corrective lenses are converging with focal length equal to 20 m. diverging with focal length equal to 5 m. diverging with focal length equal to 20 cm. diverging with focal length equal to 5 cm. converging with focal length equal to 5 cm. converging with focal length equal to 5 m.

When a laser beam is aimed onto the face of a transparent glass cube, which of the following best illustrates the direction of the beam after it emerged from the cube?Image4.gif (a) (b) (c) (d) (e)

What is the critical angle of light rays inside a gem whose refractive index is 2.4? Assume that the gem is surrounded by air. 65o 67o 90o 25o 42o

A concave mirror forms an inverted image, four times larger than the object. If the distance between image and object is 0.6 m, find the focal length of the mirror. 2 cm 9.6 cm 24 cm 60 cm 16 cm

A light source emits radiation isotropically in all directions. The intensity at a distance 0.52 m from the center of the source is 108 W/m2. What is the intensity at a distance 1.04 m from its center in W/m2?Enter a number with one digit behind the decimal point.

One of the ways in which a coin operated vending machine checks to make sure that the coins fed to it are genuine is to roll them past a strong magnet. Only coins made of magnetic materials such as iron will be affected by the magnet. Coins made of a good conductor will speed up as they roll past the magnet. Coins made of a good conductor will slow down as they roll past the magnet. The coins will become magnetized and thus can easily be sorted.

Suppose that a pane of crown glass, with a refractive index of 1.52, is immersed in water, which has a refractive index of 1.33. A ray of light traveling in the water strikes the glass at 45° relative to the normal and travels through the pane. What angle, relative to the normal, will the ray of light subtend when it leaves the pane and reenters the water? 38° 54° 32° 45° No angle at all! The premise is wrong. The light will never enter the glass. It will be reflected when it strikes the glass surface.

A ray of green light travels through air and is refracted as it enters a glass prism shown in the figure. An unknown liquid is in contact with the right side of the prism. The light then follows the path shown. Which one of the following statements concerning this situation is true? Image9.gif The frequency of the light changes inside the prism. The index of refraction of the glass is smaller than that of air. The index of refraction of the unknown liquid is the same as that of the glass. The speed of light is larger in the liquid than in the glass. The refractive index of the liquid is the same as that of air.

The loop of wire is being moved to the right at constant velocity.A constant current I flows in the long straight wire in the direction shown. The current induced in the loop is clockwise and constant. counterclockwise and constant. clockwise and decreasing. counterclockwise and decreasing. zero.

The x marks the focal point of the lens below. Where will we find the image?Image8.jpg B A C D

The figure below shows a piece of copper wire moving across a horizontal magnetic field. There will befield.png a potential difference between its ends, end 1 being at a higher potential. a potential difference between its ends, end 2 being at a higher potential. no potential difference between its ends. a time varying potential difference across its ends. a potential difference across its sides.