| Class VII |
Science |
Curiosity |
10 |
u C Reprint 2026-27 |
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| Class VII |
Science |
Curiosity |
11 |
Light:Shadowsand Reflections In the Western Ghat region of Maharashtra, Keshav spends partofhissummervacationathisfriendJatin’sgrandparents’ village... |
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| Class VII |
Science |
Curiosity |
11 |
of electric light sources, most of the lighting needs of humans are now met by electric Fig. 11.1: Some natural sources oflighting (Fig. 11.3). Obj... |
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| Class VII |
Science |
Curiosity |
11 |
matchboxes, ensuring L that its lamp is at the height of the holes. Placeacardboard(screen)ontheothersideofthematchboxes andobtainabrightspotonit... |
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| Class VII |
Science |
Curiosity |
11 |
will learn in the higher grades. 11.3 Light through Transparent, Translucent, and Opaque Materials Let us place objects made of What happens when a... |
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| Class VII |
Science |
Curiosity |
11 |
What conclusions could you draw? Light passes almost completely through transparent materials. Light passes partially through translucent materials... |
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| Class VII |
Science |
Curiosity |
11 |
screen fixed. n i The object is moved closer to the torch, S keeping the torch and the screen fixed. o k o The object is tilted, keeping the torch an... |
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| Class VII |
Science |
Curiosity |
11 |
polished steel plate, I got a shadow on the screen, but I also saw that there was a bright spot of light on the wall on the opposite side. Why was ... |
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| Class VII |
Science |
Curiosity |
11 |
of paper and shine d r the torch light on the slit. Adjust the comb and G torch slightly till you see a thin beam of light e along the paper which ... |
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| Class VII |
Science |
Curiosity |
11 |
positions in front of the mirror and compare the sizes of the images of the pen at each position. Are the two sizes the same? The image formed by a... |
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| Class VII |
Science |
Curiosity |
11 |
touch? You find that your left appears right in your image and your right appears left in your image. This type of perceived left-right reversal is ... |
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| Class VII |
Science |
Curiosity |
11 |
flame on the screen. Do you notice anything surprising? The image of the candle flame is upside down, that (b) is, inverted (Fig. 11.12b). Let us n... |
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| Class VII |
Science |
Curiosity |
11 |
in higher grades. 11.8 Making Some Useful Items After having learnt that light travels in a straight line and is reflected by mirrors, it is time to... |
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| Class VII |
Science |
Curiosity |
11 |
e Designers and artists often use kaleidoscopes to get ideas for new e patterns. R n a In a Nutshell s o d Objects that emit their own light are ... |
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| Class VII |
Science |
Curiosity |
11 |
the shadow formation of the boy. Qasima Fig. 11.16 (a) (b) (c) (d) Fig. 11.17 5. The shadow of a ball is formed on a wall by placing the ball in fr... |
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| Class VII |
Science |
Curiosity |
11 |
(i) At which of the given times is your shadow the shortest? DISCOVERY t (ii) Why do you think this happens? g L 10. On the basis of following stat... |
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| Class VII |
Science |
Curiosity |
11 |
with each other or parallel to each other? Find out by placing History Art two mirrors as shown in Fig. 11.21. Geography Society Technology Economy... |
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| Class VII |
Science |
Curiosity |
12 |
Earth,Moon,and theSun One morning in Kanniyakumari, Tamil Nadu, 12-year-old Rashmika was eagerly cycling to school. She was excited. That was share... |
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| Class VII |
Science |
Curiosity |
12 |
the time? r The tree appears to turn around you in the opposite direction, G that is, the clockwise direction. The tree appears in your view e n fr... |
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| Class VII |
Science |
Curiosity |
12 |
direction, that is, from West to East. Southern Let us try to understand this with the help of a globe. You have used a globe in Grade 6 to represe... |
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| Class VII |
Science |
Curiosity |
12 |
part of India on the globe, rotate the globe in one direction and then in the opposite direction. What is the direction of rotation when light fall... |
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| Class VII |
Science |
Curiosity |
12 |
the West. The stars a t my right in the East. will now become visible E in the night sky. Fig. 12.6: A girl on the rotating Earth viewing the Sun f... |
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| Class VII |
Science |
Curiosity |
12 |
AM on the same night. 9 PM Draw the orientation of the Big 5 AM Dipper in the sky with respect 7 PM to the Pole Star (or a fixed tree/building on ... |
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| Class VII |
Science |
Curiosity |
12 |
a famous n mathematician and astronomer of ancient India who wrote an , important treatise, Aryabhatiya, around the fifth century CE. The n apparent... |
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| Class VII |
Science |
Curiosity |
12 |
We know that this occurs due to the Earth’s rotation. As the Earth also revolves around the Sun continuously, the stars seen in the night sky after... |
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