Write laws of refraction. Explain the same with the help of ray diagram, when a ray of light passes through a rectangular glass slab.
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Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram.
Hint— Draw the diagram and explain using laws of refractions at both the interfaces.
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A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
The light ray bends towards the normal. When a ray of light travels from an optically rarer medium to an optically denser medium, it gets bent towards the normal. Since...
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With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field
Right hand thumb rule states that if a current carrying straight conductor is supposedly held in the right hand with the thumb pointing towards the direction of current, then the...
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What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
As per the laws of reflection The angle of incidence ∠i = angle of reflection ∠r Here as given ∠i + ∠r = 90° ∴ ∠i + ∠i = 90 ° or ∠i =...
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How did the knowledge of ancient texts help the reformers promote new laws?
Various social reformers used ancient texts to convince the people about the need for abolishing certain social evils. Quotation from ancient texts gave weight to their arguments.
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A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why
Light ray travelling in air and entering obliquely into water is bent towards the normal; because the speed of the ray decreases in water.
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What were the Corn Laws ? Why were these laws abolished ? How abolition of the Corn Laws affect the people in England ?
(i) The laws allowing the British Government to restrict the import of corn is known as the "Corn Laws". (ii) These laws were abolished because the industrialists and urban dwellers were...
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State the laws that are followed when light is reflected by spherical mirrors. Draw a ray diagram to show the formation of image of an object
(i) The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the same plane, and (ii) The angle of incidence is...
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What is water harvesting? Explain the traditional water harvesting system with a suitable diagram. Write about the techniques of water harvesting.
Water harvesting is a technique of capturing rain water when it falls and taking measures to keep the water clean. The two ways by which water harvesting can be undertaken are: (i)...
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Find the maximum angle of refraction when a light ray is refracted from glass (μ= 1.50) to air.
From the definition of critical angle, if refracted angle is more than 90°, then reflection occurs, which is known as total internal reflection. So, maximum angle of refraction is 90°.
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