Power of a concave lens is - 12.5 D. What is the focal length of the lens?
in lenses of power + 4.5 D and -SD are placed in contact with each other.
power of the combination, (ii) focal length of the combination.
(ii) 2 m]
ver of a thin convex lens is +3.5 D. It is placed in contact with another
ch that the combined power is + 1.0 D. Calculate: i) power of second
focal length of the second lens.
0.4 m/
power and focal length of a combination of convex lens of loca
d concave lens of focal length 10cm.
161)
f focal length 40 cm is placed in contact with concave lens of
Calculate (i) power of the combination (ii) focal length of the

What best describes a sonar wave? transverse and electromagnetic transverse and mechanical longitudinal and electromagnetic longitudinal and mechanical

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?