Class 6 Science Chapter 11 Light, Shadows and Reflections (পোহৰ , ছাঁ আৰু প্ৰতিফলন) answer to each chapter is provided in the list so that you can easily browse throughout different chapter Assam Board As Per New Syllabus Class 6 Science Chapter 11 Light, Shadows and Reflections (পোহৰ , ছাঁ আৰু প্ৰতিফলন) and select needs one.
SEBA Class 6 Science Chapter 11 Light, Shadows and Reflections (পোহৰ , ছাঁ আৰু প্ৰতিফলন)
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Light, Shadows and Reflections [পোহৰ , ছাঁ আৰু প্ৰতিফলন]
Chapter: 11
Exercises
Q.1. Rearrange the boxes given below to make a sentence that helps us understand opaque objects.
OWS AKE OPAQ UEO BJEC TSM SHAD
Ans: OPAQ UEO BJEC TSM AKE SHAD OWS
Q.2. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non- luminous:
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polyethene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon.
Ans: (i) Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, a piece of red hot iron, an um- brella, a lighted fluorescent tube, a wall, a sheet of carbon pa- per, the flame of a gas burner, a sheet of cardboard, a lighted torch, kerosene stove, sun, firefly, moon.
(ii) Transparent: Air, water, a sheet of plane glass, a sheet of cellophane.
(iii) Translucent: A sheet of polythene, smoke, fog.
(a) Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, kerosene stove, sun, firefly.
(b) Non-luminous: Air, water, a piece of rock, a sheet of aluminium. a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cello- phane, a wire mesh, moon.
Q.3. Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?
Ans: Yes, we can think of a cylinder which would give a circular shadow if held in one way and a rectangular shadow if held in another way.
Q.4. In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?
Ans: No, because there is no light in the room and hence no reflection of light will occur and no image will be formed.
Additional Questions & Answer
A. Very short answer type questions and answers
Q.1. What helps us to see the objects?
Ans: Light helps us to see the objects.
Q.2. What are luminous objects?
Ans: Objects which give out or emit light of their own are called luminous objects.
Q.3. Give two examples of luminous objects.
Ans: The Sun, a lighted torch.
Q.4. What are non-luminous objects?
Ans: Objects which do not give out or emit light of their own are called non- luminous objects.
Q.5. Give two examples of non-luminous objects.
Ans: A sheet of aluminium, a piece of wood.
Q.6. How do we see different objects?
Ans: When light from a luminous object falls on the objects, it gets reflected and enters our eyes enabling us to see the ob- jects.
Q.7. What are opaque objects?
Ans: The objects through which we cannot see at all are called opaque objects.
Q.8. What are transparent objects?
Ans: The objects through which we are able to see clearly are called transparent objects.
Q.9. What are translucent objects?
Ans: The objects through which we can see, but not very clearly are called translucent objects.
Q.10. Give two examples of opaque objects?
Ans: A sheet of paper, a sheet of cardboard.
Q.11. Give two examples of transparent objects.
Ans: Air, water.
Q.12. Give two examples of translucent objects.
Ans: A sheet of polythene, fog.
Q.13. What do you need to see a shadow?
Ans: To see a shadow, we need a source of light, an opaque object and a screen.
Q.14. What information do the shadows give us?
Ans: Shadows give us some information about shapes of the objects.
Q.15. What type of images do you see with your pinhole camera?
Ans: We see upside down images with our pinhole camera.
Q.16. When does a shadow form?
Ans: A shadow is formed when an opaque object obstructs the light.
Q. 17. How does mirror form image?
Ans: A mirror forms image by reflection of light.
Q.18. Fill in the blanks with words from among the given alternatives.
(a) Without _______, things cannot be seen. (shadow/light)
Ans: Light.
(b) Objects which give out light of their own are called _______ objects. (transparent/luminous)
Ans: Luminous.
(c) Light travels along a ________ line. (straight/curved)
Ans: Straight.
(d) Opaque objects ________ light to pass through them. (allow/ do not allow)
Ans: Do not allow.
(e) Transparent objects ____ light to pass through them. (allow/do not allow)
Ans: Allow.
(f) Translucent objects allow light to pass through them ________ (fully / partially)
Ans: Partially.
(g) A mirror changes the ________ of light that falls on it. (colour/ direction)
Ans: Direction.
অসমীয়া মাধ্যমত পাঠভিত্তিক প্ৰশ্নোত্তৰ
প্ৰশ্ন : – ১) অস্বচ্ছ বস্তুৰ বিষয়ে বুজি পাবলৈ তলৰ কাঁচবোৰ পুনৰ সজাই এটা বাক্য বনোৱা ।
OWS ,AKE ,OPAQ,UEO,BJEC,TSM,SHAD
উত্তৰঃ – OPAQ,UEO,BJEC,TSM,AKE,SHAD,OWS
প্ৰশ্ন : – ২) তলত দিয়া বস্তু বা সঁজুলিবোৰ অস্বচ্ছ , স্বচ্ছ বা ঈষৎ স্বচ্ছ আৰু উজ্জ্বল বা অনুজ্জ্বল এইদৰে শ্ৰেণীবিভাগ কৰা :
বায়ু , শিলগুটি , এচটা এলুমিনীয়াম , এখন দাপোন , এখন কাঠৰ বৰ্ড , এখিলা পলিথিন , এখন চিডি , এখন সমতল দাপোন , কুঁৱলী , ৰঙাকৈ গৰম কৰা এটুকুৰা লো , এটা ছাটি , ধোঁৱা , এটা জ্বলি থকা প্ৰতিপ্রভা টিউব লাইট , এখন বেৰ , এখিলা কাৰ্বন পেপাৰ , গেছ বাৰ্ণৰৰ শিখা , এখন কাৰ্ড বৰ্ড , এটা জ্বলি থকা টৰ্চ , এটা চেলফোন তাৰৰ জালি , কেৰাচীনৰ ষ্টভ , সূৰ্য , জোনাকী পৰুৱা , চন্দ্ৰ ।
উত্তৰঃ – ক) স্বচ্ছ : বায়ু , এচটা কাংচ , এটা চেল’ফোন ।
খ)ঈষৎ স্বচ্ছ : এখিলা পলিথিন , কুঁৱলী , ধোঁৱা , তাৰ ।
গ) অস্বচ্ছ : শিলগুটি , এচটা এলুমিনীয়াম , কাঠৰ বৰ্ড , এখন চিডি , ছাটি , দেৱালা ।
ঘ) উজ্জ্বল বস্তু : ৰঙাকৈ গৰম কৰা এটুকুৰা লো , পাতল ফ্লৰ’চেণ্ট টিউব , গেছৰ বাৰ্ণাৰ , জ্বলাই ৰখা টৰ্চ , কেৰাচিনৰ ষ্টোভ , সূৰ্য , জোনাকী পৰুৱা , চন্দ্ৰ ।
প্ৰশ্ন : – ৩) এনে এটা আকৃতিৰ বস্তু তৈয়াৰ কৰাৰ কথা ভাবিব পাৰিনে যিটো এটা দিশত ৰাখিলে ঘূৰণীয়া ছাঁৰ সৃষ্টি কৰে আৰু আন এটা দিশত ৰাখিলে আয়তাকাৰ ছাঁৰ সৃষ্টি কৰে ?
উত্তৰঃ – পাৰি । উদাহৰণ স্বৰূপে এটা চিলিণ্ডাৰ , এখন বৃত্তাকাৰ থাল ৰাখিলে এনে ঘটনা সংঘটিত হব ।
প্ৰশ্ন : – ৪) এটা সম্পূৰ্ণ আন্ধাৰ কোঠাত যদি তুমি তোমাৰ সন্মুখত দাপোনখন ধৰা তেতিয়া তোমাৰ প্ৰতিবিম্ব দেখা পাবানে ?
উত্তৰঃ – পোহৰ নথকাৰ বাবে কোনো প্ৰতিবিম্ব গঠন নহয় ।
Sl. No. | Contents |
Chapter 1 | খাদ্য: আমি ক’ৰ পৰা পাওঁ |
Chapter 2 | খাদ্যৰ উপাদান |
Chapter 3 | আঁহৰ পৰা কাপোৰলৈ |
Chapter 4 | পদাৰ্থবোৰক বিভিন্ন ভাগত ভগোৱা |
Chapter 5 | দ্ৰৱ্যৰ পৃথকীকৰণ |
Chapter 6 | আমাৰ চৌপাশৰ পৰিবৰ্তনবোৰ |
Chapter 7 | উদ্ভিদৰ বিষয়ে জানো আহা |
Chapter 8 | দেহৰ চলন |
Chapter 9 | জীৱ আৰু ইয়াৰ চৌপাশৰ বাতাবৰণ |
Chapter 10 | গতি আৰু দূৰত্বৰ জোখ – মাপ |
Chapter 11 | পোহৰ, ছাঁ আৰু প্ৰতিফলন |
Chapter 12 | বিদ্যুৎ আৰু বৰ্তনী |
Chapter 13 | চুম্বকৰ লগত খেলো আহাঁ |
Chapter 14 | পানী |
Chapter 15 | আমাৰ চৌপাশৰ বায়ু |
Chapter 16 | আৱৰ্জনা নিষ্কাষন |

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