The index of refraction for water is about
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Chapter 25 Solutions
Principles of Physics: A Calculus-Based Text
- A ray of light crosses the boundary between some substance with n = 1.46 and air, going from the substance into air. If the angle of incidence is 26◦ what is the angle of refraction?arrow_forwardWhat is the speed of light traveling from air to a medium of refractive index n=1.5? (Speed of light in vacuum is 3.0 × 108 m/s) O 2.0 × 108 m/s. X O 1.5 × 108 m/s. O 3.0 × 108 m/s. O 0.67 × 108 m/s. O 0.75 × 108 m/s. X Carrow_forwardYour answer is partially correct. A distant galaxy emits light that has a wavelength of 634.5 nm. On earth, the wavelength of this light is measured to be 639.0 nm. (a) Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give your answer to 4 significant digits. Use 2.998 x 108 m/s as the speed of light.) (a) The galaxy is (b) Number receding 2126000 from the earth. Units m/sarrow_forward
- The speed of light is faster through a substance with an index of refraction of 1.2 versus a substance with an index of refraction of 1.3. True or False?arrow_forwardA ray is incident upon a reflective surface at an angle of θi=46.8∘ relative to the direction normal to the surface (see image below to help visualize the situation). What is the angle of the reflected ray (θr) relative to the normal direction (in degrees)?arrow_forwardA ray of light crosses the boundary between some substance with n = 1.46 and air, going from the substance into air. If the angle of incidence is 26◦ what is the angle of refraction? Calculate to 1decimal.arrow_forward
- Theoretically the speed of light c through vacuum is expressed as c = 1/√(Mo), E, and μ, are the electric permittivity and magnetic permeability of free space (vacuum). Therefore, for a medium with dielectric constant, the speed of light (v) should be expressed as O V = √(EoHo) / K Ov=1/K √(EoHo) v=1/√(K EoHo) Ov=K/√(EoHo)arrow_forwardThe speed of light in an unknown medium is measured to be 4.76 x 10^8 m/s. (a) What is the index or refraction of the medium?arrow_forward(a) The distance to a star is approximately 4.97 × 10¹8 m. If this star were to burn out today, in how many years would we see it disappear? years (b) How long does it take sunlight to reach Earth? minutes (c) How long does it take for a microwave radar signal to travel from Earth to the Moon and back? (The distance from Earth to the Moon is 3.84 x 105 km.) Sarrow_forward
- A ray of light traveling in through the river strikes a floating resin block at an angle of incidence (????); part of the beam is reflected and part of it is refracted. If the reflected and refracted beams make an angle (?=90∘) with each other, and the refractive index of resin is (??????=1.67), calculate ???? in degrees given refractive index of river water is ??????=1.33. Choose the closest answer.arrow_forwardTheoretically the speed of light c through vacuum is expressed as c = 1 /√(εoμo) , εo and μo are the electric permittivity and magnetic permeability of free space (vacuum). Therefore, for a medium with dielectric constant κκ, the speed of light (v) should be expressed as Group of answer choices v = κκ /√(εoμo) v = 1 /√(κκ εoμo) v = √(εoμo) / κκ v = 1 /κκ √( εoμo)arrow_forwardA ray of light is incident on a glass of refractive index 1.5. The angle between the reflected and refracted rays is 90°. What is the ratio of wavelength of reflected to refracted rays? (a) (c) 2.1 ELT 1.6 (b) 1.5 (d) 1.7arrow_forward
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