Answer: (b) - 20 cm Given parameters size of object (O) = + 10.0 mm = + 1.0 cm (as, 1 cm = 10 mm) Size of Image (I) = 5.0 mm = 0.5 cm Image... View Article
Answer: The atmosphere is made up of several layers. The upper layer is optically rare, but the bottom layer is optically denser. Refraction... View Article
Answer: During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth’s atmosphere before reaching our... View Article
Answer: The angle of deviation is defined as the angle which is obtained from the difference between the angle of incidence and 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. Hypermetropia is a... View Article
Answer: The human eye is one of the most valuable and sensitive sense organs. It enables us to see the wonderful world and the colours around... View Article
Answer: During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth’s atmosphere before reaching our... View Article
Answer: Rainbow is caused by the dispersion of sunlight by tiny water droplets, present in the atmosphere. A rainbow is always formed in a... View Article
Answer: No, that is not the truth. We see the apparent position of the star because we know there are many layers in the atmosphere, so... View Article
Answer: By placing two identical prisms inverted with respect to the other we get a narrow beam of white light incident on one prism emerges... View Article
Answer: (a) Myopia Myopia is the inability of an eye in viewing long distant objects. The image in this case is formed before the retina. For... View Article
Answer: Our eyes can focus on the images from a varied distance by changing the focal length of the lens. The action of the Ciliary muscle... View Article
Answer: If a student cannot see the blackboard distance to her she is suffering from Myopia. Hence doctor advises a concave lens of suitable... View Article
Answer: Myopia is a condition where a person cannot see distant objects clearly and he can see nearer objects clearly. Hypermetropia is a... View Article
Answer: (c) A person with myopia can see nearby objects clearly Myopia is a condition where a person cannot see distant objects clearly and he... View Article
Answer: (a) are relaxed and the lens becomes thinner When the muscles are relaxed, the lens becomes thin. Thus, its focal length increases.... View Article
Answer: (b) outer surface of the cornea When light rays enter the eye through a thin membrane, the cornea forms a transparent bulge on the... View Article
Answer: (c) Scattering of light Because of light absorption and scattering, the sea is blue in colour. The water in the ocean, seas, and... View Article
Answer: (b) Scattering of light During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth’s atmosphere... View Article
