Class name Subject Book title Chapter number Content Created at
Class X Science Science 9 as the object is moved away from the mirror? We consider two positions of the object for studying the image formed by a convex mirror. First is whe...
Class X Science Science 9 = h (9.2) The magnification m is also related to the object distance (u) and image distance (v). It can be expressed as: h′ v Magnification (m) = =...
Class X Science Science 9 is placed at 25.0 cm in front of a concave mirror of focal length 15.0 cm. At what distance from the mirror should a screen be placed in order to o...
Class X Science Science 9 slab is placed over some printed matter, the letters appear raised when viewed through the glass slab. Why does it happen? Have you seen a pencil p...
Class X Science Science 9 up the coin in one go. Did you succeed in picking up the coin? ■ Repeat the Activity. Why did you not succeed in doing it in one go? ■ Ask your fri...
Class X Science Science 9 9.10 ■ Fix a sheet of white paper on a drawing board using drawing pins. ■ Place a rectangular glass slab over the sheet in the middle. ■ Draw the ...
Class X Science Science 9 both refracting surfaces AB and CD. In Fig. 9.10, a ray EO is obliquely incident on surface AB, called incident ray. OO ′is the refracted ray and O...
Class X Science Science 9 transparent medium into another will change its direction in the second medium. The extent of the change in direction that takes place in a given p...
Class X Science Science 9 simply represented as n . If c is the speed of 148 Science Reprint 2026-27 light in air and vis the speed of light in the medium, then, the refract...
Class X Science Science 9 down and bends towards the normal. When it travels from a M denser medium to a rarer medium, it speeds up and bends away from the normal. Light – R...
Class X Science Science 9 2F , between F 1 1 and 2F 1t F ,1between F an1 O. Note down and tabulate your observations. The nature, position and relative size of the image for...
Class X Science Science 9 9.5 below. Table 9.5 Nature, position and relative size of the image formed by a concave lens for various positions of the object Position of the P...
Class X Science Science 9 light passing through the optical centre of a lens will emerge without any deviation. This is (a) (b) illustrated in Fig.9.15(a) Figure 9.15 and Fi...
Class X Science Science 9 the letter m. If h is the height of the object and h the height of the image given by a lens, then the magnification produced by the lens is given ...
Class X Social Science Democratic Politics 1 In a democracy, people rule themselves through powers. Such a separation ensures that none of the organs can exercise institutions of self-governme...
Class X Science Science 9 10 cm; object-distance u = –15 cm; Image-distance v = ? Height of the image h′ = ? 1 1 1 Since − = v u f 1 1 1 or, v = u +f 1 = 1 + 1 = − 1 + 1 v (...
Class X Science Science 9 Reprint 2026-27 The SI unit of power of a lens is ‘dioptre’. It is denoted by the letter D. If f is expressed in metres, then, power is expressed i...
Class X Science Science 9 a lens. 2. A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the con...
Class X Science Science 9 the direction of incident ray. ■ Lens formula, 1 –1 = 1 , gives the relationship between the object-distance (u), v u f image-distance (v), and the...
Class XI Accountancy Accountancy-II 1 In other words, the profit has been over stated. Similarly, if any capital expenditure is wrongly shown as revenue expenditure (for example, purcha...
Class X Science Science 9 you prefer to use while reading small letters found in a dictionary? (a) A convex lens of focal length 50 cm. (b) A concave lens of focal length 50...
Class X Science Science 9 of curvature 30 cm. Find the position of the image, its nature and size. 15. An object of size 7.0 cm is placed at 27 cm in front of a concave mirr...
Class X Social Science Democratic Politics 1 Power-sharing Overview I With this chapter, we resume the tour of democracy that we started last r with any one organ of the government. An intelli...
Class X Social Science Democratic Politics 1 groups are the Sinhala-speakers (74 powerful. This was resented by the per cent) and the Tamil-speakers (18 Dutch-speakingcommunitywhogot per cent)...
Class X Social Science Democratic Politics 1 constitution and government the Sinhala community sought to policies denied them equal political secure dominance over government rights,discrimina...