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Under which of the following conditions a concave mirror can form an image larger than the actual object? (a) When the object is kept at a distance equal to its radius of curvature (b) When an object is kept at a distance less than its focal length (c) When an object is placed between the focus and centre of curvature (d) When an object is kept at a distance greater than its radius of curvature

Answer: (c) When an object is placed between the focus and centre of curvature The image will be located beyond... View Article

Answer: (b) – 20 cm Given parameters size of object (O) = + 10.0 mm = + 1.0 cm (as,... View Article

Answer: The atmosphere is made up of several layers. The upper layer is optically rare, but the bottom layer is... View Article

Answer: During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth’s atmosphere... View Article

Answer: The angle of deviation is defined as the angle which is obtained from the difference between the angle of... View Article

Answer: Myopia is a condition where a person cannot see distant objects clearly and he can see nearer objects clearly.... View Article

Answer: The human eye is one of the most valuable and sensitive sense organs. It enables us to see the... View Article

Answer: During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth’s atmosphere... View Article

Answer: Rainbow is caused by the dispersion of sunlight by tiny water droplets, present in the atmosphere. A rainbow is... View Article

Answer: No, that is not the truth. We see the apparent position of the star because we know there... View Article

Answer: VIBGYOR (Violet colour, Indigo colour, Blue, colour, Green colour, Yellow colour, Orange colour & red colour). Violet – 4000... View Article

Answer: By placing two identical prisms inverted with respect to the other we get a narrow beam of white light incident... View Article

Answer: (a) Myopia Myopia is the inability of an eye in viewing long distant objects. The image in this case... View Article

Answer: Our eyes can focus on the images from a varied distance by changing the focal length of the lens.... View Article

Answer: If a student cannot see the blackboard distance to her she is suffering from Myopia. Hence doctor advises a... View Article

Answer: Myopia is a condition where a person cannot see distant objects clearly and he can see nearer objects clearly.... View Article

Answer: (c) A person with myopia can see nearby objects clearly Myopia is a condition where a person cannot see... View Article

Answer: (a) are relaxed and the lens becomes thinner When the muscles are relaxed, the lens becomes thin. Thus, its... View Article

Answer: (b) outer surface of the cornea When light rays enter the eye through a thin membrane, the cornea forms... View Article

Answer: (c) Scattering of light Because of light absorption and scattering, the sea is blue in colour. The water in... View Article