Which of the following would not increase the radius of the dark fringes caused by the Newton's Rings effect?
1.increase the radius of curvature of the lens and decrease its index of refraction
2.increase the wavelength of the light and the radius of curvature of the lens
3.use a lens with a larger index of refraction and smaller radius of curvature
4.use a lens with a smaller index of refraction and increase the wavelength of the light
3
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An airplane with a wingspan of 79.0 m flies parallel to the Earth's surface at a point where the downward component of the Earth's magnetic field is 0.490 × l0?4 T. If the induced potential between wingtips is 0.875 V, what is the plane's speed?
a. 54.3 m/s b. 33.9 m/s c. 226 m/s d. 17 900 m/s e. 111 m/s
A magnifying glass uses a converging lens with a refractive power of 20 diopters. What is the angular magnification if the image is to be viewed by a relaxed eye with a near point of 25 cm?
A) 5.0 B) 3.0 C) 4.0 D) 1.0 E) 2.0
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