Question

photon with a frequency of 2.5 x 1015 Hz strikes the surface of a metal. If the can be stopped by a voltage of 3.0 v, the work function of the metal is 41) An Ultraviolet electrons that are ejected be a. 5.3 eV and the photon has an energy o b. 8.2 eV and the photon has an energy of 1.3 x 10s Joules c. 5.3 eV and the photon has an energy of 2.5 x 1019 Joules d. 8.2 eV and the photon has an energy of Joules 2.5 x 10 42) 4x10'. Hz Light strikes the surface of a cubic zroonium with a refractive index of i 9 The light a. Will not bend at an incident angle of 0° but will be 2.1 x104 Hz inside the zirconium b. Will not bend at an incident angle of 0° but will be 4x 104 Hz Hz inside the zirconium c. Will have become 1.9 x longer wavelength in the zirconium and will refract at an angle of sin-l(sin(θ) /I. 9, where 6, is the angle of incidence. d. Will have become 1.9 x shorter wavelength in the zirconium and will refract at an angle of sin-1(sin(0,)/1.9, where 0 is the angle of incidence. 43) 4 3.0 cm tall object, located 2.0 cm from a converging lens with a focal length of 6 cm the image is a. Upright and virtual at a distance of 3.0 cm from the lens b. Inverted with at a distance of 2.0 cm from the lens and virtual c. Magnified by 4 and a real image d. Inverted and real at a distance of 3.0 cm from the lens 44) Plane polarized light is projected through 2 polarizers. The first polarizer is rotated to 20 ° from the plane of the polarized light. The second is rotated is rotated to 30° away from the second polarizer How much of the original light intensity will be found after each polarizer? a. The 0.50 l, after the first, 0.38 Io after the second b. The 0.50 I, after the first, 0.66 I, after the second c. The 0.88 lo after the first, 0.38 lo after the second d. The 0.88 I, after the first, 0.66 l, after the second 45) When a hair, 4 x 10* m wide, is held in front of a laser pointer with a 532 nm light a bright line interference pattern develops on a target 2.0 m away. The bright points are: a. 2.6 cm apart and the result of destructive interference b. 2.6 cm apart and the result of constructive interference c. 1.3 cm apart and the result of destructive interference d. 1.3 cm apart and the result of constructive interference
just letter suffice . all 4 qs

Answer 1

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