With the help of Newton’s disc, prove that seven colours of the rainbow can be recombined and produce white light
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0
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1311
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March 23, 2018
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Explain the reflection of light on white paper screen with the help of an activity
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0
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3065
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March 23, 2018
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Distinguish between the following. Real image and Virtual image ,Convergent beam and Divergent beam
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0
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1744
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March 23, 2018
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You are given three mirrors of different types. How will you identify each one of them?
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0
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5450
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March 23, 2018
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What is rectilinear propagation of light? How will you prove it?
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0
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2507
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March 23, 2018
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What is regular and irregular reflection?
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0
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4526
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March 23, 2018
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Suppose we wish to obtain the real image of a distant tree
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0
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1754
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March 23, 2018
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It was observed that when the distance between an object and a lens decreases
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0
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1784
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March 23, 2018
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Why should you not look at the sun through a convex lens?
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0
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1973
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March 23, 2018
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What is a Newton’s disc?
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0
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1102
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March 23, 2018
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State the characteristics of the image formed by a plane mirror
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0
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993
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March 23, 2018
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What is lateral inversion?
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0
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5174
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March 23, 2018
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Give one use each of a concave and a convex mirror
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0
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4671
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March 23, 2018
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State two differences between a convex and a concave lens
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0
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8603
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March 23, 2018
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What is a virtual image? Give one situation where a virtual image is formed
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0
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1924
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March 23, 2018
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A shopkeeper wanted to fix a mirror which will give a maximum view of his shop
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0
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2300
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March 23, 2018
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Two different type of lenses are placed on a sheet of newspaper
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0
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2907
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March 23, 2018
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An erect and enlarged image of an object is formed on a screen. Explain how this could be possible. [NCERT Exemplar] The image formed on the screen could be enlarged and erect if the object is placed upside down between F and 2F of the lens
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0
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668
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March 23, 2018
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State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in figure
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0
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2297
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March 23, 2018
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Boojho made light from a laser torch to fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason
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0
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1883
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March 23, 2018
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Observe the figures given below carefully
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0
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1298
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March 23, 2018
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Find out the position of the image of an object situated at A in the plane mirror
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0
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1344
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March 22, 2018
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Explain how you can take care of your eyes
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0
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20068
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March 22, 2018
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Draw a labelled sketch of the human eye
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0
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3846
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March 22, 2018
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Describe the construction of a Kaleidoscope
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0
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4906
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March 22, 2018
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Describe an activity to show that the incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane
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0
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14575
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March 22, 2018
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Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case
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0
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10648
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March 22, 2018
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Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?
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0
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1560
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March 22, 2018
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Write down the names of parts of the eye marked in the figure given below
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0
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1447
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March 22, 2018
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Boojho planned an activity to observe an object A through pipes as shown in figure below, so that he could see objects which he could not directly see
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0
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10573
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March 22, 2018
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