When a monochromatic light having only one wavelength, passes through a prism, will it show dispersion?
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Sound can travel through (a) gases only (b) solids only (c) liquids only (d) solids, liquids and gases
Correct Answer is: (d) Sound is transmitted by particles (atoms or molecules) in a solid, liquid or gas colliding with each other. It is a wave which is created by vibrating...
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Light enters from air into glass having refractive index 1.50. What is the speed of light in glass? The speed of light in vacuum is 3 x 108 ms-1.
Given,n=1.5 and the speed of light in vacuum, c = 3x 108 ms-1. We know that the refractive index is given by the expression n =c/v where c is the...
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Why there is no dispersion of light refracted through a rectangular glass slab?
After refraction at two parallel faces of a glass slab, a ray of light emerges in a direction parallel to the direction of incidence of white light. As rays of...
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A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited
Time taken by the laser beam to return to Earth after reflection from the Moon = 2.56 s Speed of light = 3 × 108 m/s Time taken by the laser beam to...
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Water flows through two identical tubes A and B. A volume V_o of water passes through the tube A and 2 V_o through B in a given time.
(a) Flow in both the tubes are steady. (b) Flow in both the tubes are turbulent. (c) Flow is steady in A but turbulent in B. EXPLANATION: Since double the volume passes in B at the same time,...
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The angular dispersion produced by a prism (a) increases if the average refractive index increases
(a) increases if the average refractive index increases
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A light source emits monochromatic light of wavelength 555 nm. The source consumes 100 W of electric power
Overall luminous efficiency =Total luminous flux / Power input =35x685/100 = 239.75 lumen/W
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Light passes through a closed cylindrical tube containing a gas. If the gas is gradually pumped out, the speed of light inside the tube will
(a) increase
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Water flows through two identical tubes A and B. A volume V0 of water passes through the tube A and 2V0 through B in a given time,
(a) Flow in both the tubes are steady. (b) Flow in both the tubes are turbulent. (c) Flow is steady in A but turbulent in B. EXPLANATION: Since double the volume passes in B at...
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Consider the following statements: 1. Light of longer wavelength are scattered much more than the light of shorter wavelength.
(d) Radio waves are a form of electromagnetic radiation, created whenever a charged object (in normal radio transmission, an electron) accelerates with a frequency that lies in the radio frequency...
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