Q5 a) Choose the correct answer. 1- The ratio of the speed of light in vacuum to the speed in the material is called: b- Velocity a- Index of refraction - Critical angle d- Frequency 2- The number of wave cycles arriving per unit time must equal the number leaving per unit time is called: a- Wavelength b-Lateral magnification e Frequency d- Speed 3- The dependence of wave speed and index of refraction on wavelength is called: a- Reflection b-Dispersion c- Refraction d- Absorption

Q5 a) Choose the correct answer. 1- The ratio of the speed of light in vacuum to the speed in the material is called: b- Velocity a- Index of refraction - Critical angle d- Frequency 2- The number of wave cycles arriving per unit time must equal the number leaving per unit time is called: a- Wavelength b-Lateral magnification e Frequency d- Speed 3- The dependence of wave speed and index of refraction on wavelength is called: a- Reflection b-Dispersion c- Refraction d- Absorption

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter1: The Nature Of Light

Section: Chapter Questions

Problem 36P: On the Moon’s surface, lunar astronauts placed a comet reflector, off which a laser beam Is...

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From his measurements, Roemer estimated that it took 22 mm for light to travel a distance equal to the diameter of Earth’s orbit around the Sun. (a) Use this estimate along with the known diameter of Earth’s orbit to obtain a rough value of the speed of light. (b) Light actually takes 16.5 mm to travel this distance. Use this time to calculate the speed of light.
A pure red object on a black background seems to disappear when illuminated with pure green light. Explain why.
On the Moon’s surface, lunar astronauts placed a comet reflector, off which a laser beam Is periodically reflected. The distance to the Moon is calculated from the round-trip time. What percent correction Is needed to account for the delay in time due to the slowing of light in Earth’s atmosphere? Assume the distance to the Moon is precisely 3.84108 m and Earth’s atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 km thick with a constant index of refraction n= l.000293.
(a) What is me ratio of the speed of red light to violet light in diamond, based on Table 25.2? (b) What is this ratio in polystyrene? (c) Which is more dispersive?
When light moves from a material with a smaller index of refraction into a material with a larger index of refraction what happens to the light? A. Its speed and wavelength increase but the frequency stays the same. B. It's speed a decreases but it's frequency and wavelength stays the same. C. Its speed and wavelength decreases and its frequency stays the same. D. Its speed decreases but its wavelength and frequency both increase. E. It's speed wavelength and frequency all increase.
Why light is said to have a dual nature? a. It exhibits the properties of wave and particles. b. It exhibits the properties of reflection and diffraction. c. It has both interference and polarization effect. d. None of the above
When light travels from air into water, which of the following statements is accurate? a. The wavelength decreases, and the speed decreases. b. The wavelength decreases, and the speed increases. c. The wavelength increases, and the speed decreases. d. The wavelength increases, and the speed increases.
The speed of light in a plastic is measured at 2.5 x 10® m/s. Calculate: a- the index of refraction, b- the frequency of the light if the wavelength of this light in vacuum is 635 nm c- The energy of a photon of this light
5. When light goes from one material into another material having a higher index of refraction, A. its speed decreases but its wavelength and frequency both increase. B. its speed and wavelength decrease, but its frequency stays the same. C. its speed, wavelength, and frequency all decrease. D. its speed increases, its wavelength decreases, and its frequency stays the same. E. its speed decreases but its frequency and wavelength stay the same.
a.) Describe the principles behind the interference and diffraction of light? b.) How does interference and diffraction of light interconnection with each other and how can they be used beneficially to us? Give at least one.
Light ray A, travelling in vacuum, is incident on a thin liquid that is used to coat a glass surface. Reflected rays B, C, and D are also shown on the diagram. The refractive index of glass is larger than the refractive index of the liquid coating. SQ-T9.3-P1-Q3 A B D. vacuum liquid glass Which of the following statements is true about the phase change of the three reflected rays? A. All three rays undergo a phase change of 180°. B. Only ray B undergoes a phase change of 180°. C. Only rays B and C undergo a phase change of 180°. D. Only rays C and D undergo a phase change of 180°. Answer C.
What is the index of refraction of a material if the speed of light through the material is 2.75x10^8 m/s? A. 1.27 B. 1.52 C. 1.09 D. 1.36