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An overhead light fixture holds three light bulbs.
Every light bulb has a luminous flux of 1892 lm.
The light fixture is 1.8 m above the floor.
What is the illuminance on the floor?
Q. Figure s (a) and (b) show refraction of a ray in air incident at 60°with the normal to a glass Answer According to the given figure for the glass-air interface:
Huygens' construction; Huygens' principle (C. Huygens): The mechanical propagation of any wave (exclusively, of light) is equal to supposing that each point on the wavefront b
Explain the Wave Particle Duality Any object in the world can be considered to be a particle or wave and will exhibit properties of both. For example, a photon of light, an ele
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A ball of mass 0.7 kg is dropped vertically from a height of 10 m onto a concrete floor. The ball is observed to bounce a number of times before coming to rest. The coefficient of
An α particle is a positively charged particle. Rutherford observed the behaviour of these particles when they approach the interior of the atoms as shown in fig. Rutherford ob
Define Isochoric Cooling and Isobaric Expansion? An ideal gas of total mass and molecular weight μ is isochorically (at constant volume) cooled to a pressure n times smaller th
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The intermolecular forces (F) of attraction can be described as given: 1) Cohesion. The force of attraction among molecules of the same substance is known as the force of cohe
The higher power level band is called as the conduction band. (i) It is also called as empty band of minimum energy. (ii) This band is partially filled by the electrons. (
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