A certain type of laser emits light that has a frequency of 5.5 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.7 × 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse? = (a)N Number i Units = (b)N Number i Units >
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- what is the frequency of a helium-neon laser with a wavelength of 632.8nm? The speed of light is 3.00x10^8m/s.The intensity of light I through a lake at a depth of x meters is given by the following formula. dI/dx=(−1.31)I (a) At what depth is the intensity of the light half that of the intensity at the surface, I0? (b) At 5 meters deep, what is the intensity of the light as a fraction of I0? c) At what depth will the intensity of the light be 11% of the light at the surface?A certain type of laser emits light that has a frequency of 5.6 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.9 × 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the light remains the same, but the speed of the light slows down to 2.3 x 108 m/s. How many wavelengths are there now in one pulse?
- Two observers stand 20 m apart on a line that connects them and a spherical light source. If the observer nearer the source measures a light intensity 59 %% greater than the other observer, how far is the nearer observer from the source?In general, X-rays have wavelengths between 10 nm and 0.01 nm. For an X-ray with a wavelength of 1 nm, what is the corresponding frequency? The speed of light is 3 × 108 m/s. The frequency of the X-ray is _____ × 1016 HzLight from a laser is propagating in the horizontal direction when it strikes a vertical wall. If the time-averaged intensity of the light from the laser beam is 1,500 watts/m2, what pressure does the beam exert on the wall? a. 4.5 x 10-6 Pa b. 4.0 x 10-6 Pa c. 3.5 x 10-6 Pa d. 3.0 x 10-6 Pa e. 5.0 x 10-6 Pa
- Which statement is not true about light? It is an electromagnetic wave. It travels in vacuum at 3 x 108 m/s. It has a dual nature: as a particle and a wave. It travels the path that requires the longest time.The intensity of light I through a lake at a depth of x meters is given by the following formula. dI/dx = (-2.31)I a.) At what depth is the intensity of the light half that of the intensity at the surface, I00? b.) At 5 meters deep, what is the intensity of the light as a fraction of I0? c.) How many meters deep will the intensity of light be 1 percent of the intensity of the light at the surface? Remember that the depth at the surface is x = 0.Light is an example of what type of wave? a. Transverse wave b. Electromagnetic wave c. Heatwave d. Longitudinal wave 2. The ratio of the height of the image to the height of the object is referred to as: a. H-index b. Index of interference c. Index of diffraction d. Index of reflection e. None of the above 3. The act of assuming that the rays coming from a distant object are parallel a. Taylor Approximation b. Standard Approximation c. Ray Approximation d. Paraxial Approximation 4. A very narrow beam of intense light is said to be near: a. Dichromatic b. Trichromatic c. Monochromatic d. None of the above 5. The branch of physics that deals with the nature and propagation of light a. Optical science b. Optics c. Photonics d. Radiology 6. The term refers to the “bouncing” of light as it strikes a smooth and even surface a. Refraction b. Rarefaction c. Reflection d. Diffraction 7. The term refers to the…
- In Young's experiment, the electric fields of the waves arriving at point P are given by E1 = (5.00 µN/C) sin{(4.74 × 1015)t} E2 = (9.00 µN/C) sin{(4.74 × 1015)t + 21.1 rad}, where time t is in seconds. What is the amplitude of the resultant electric field at point P?At a temperature of 20.0o two speakers are sending sound waves of frequency 512 Hz and 2048 Hz respectively toward a door opening of width 90.0 cm. Which wave frequency experiences a greater diffraction angle upon passing through the opening? Group of answer choices a.the 512 Hz b.the 2048 Hz c.both about the sameIf the polypropylene has a refractive index of 1.5, what the wavelength of the laser light whose wavelength in the air is 790 nm would be in the propylene?