NCERT - 8 - Science :: Light
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[Contributor - Anu Nived]
Objective: To teach the students about light, laws of reflection and types of reflections
Subtopics to be covered:
- Laws of reflection
- Types of Reflection
- Kaledioscope
- Parts of our eye and eye care
- Braille system
Learning Outcome:
- Students know what is light, how single and multiple images are formed
- They know how visually challenged persons use Braille system to read and write
- They also know how to care their eyes, diseases affecting eyes, etc.
[Contributor - Kripa S]
http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0855-Vigyan/Chapter-16/index.html (NCERT Hindi Medium)
http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0854-Science/Chapter-16/index.html (NCERT English Medium)
https://drive.google.com/open?id=0BzNF2YyqQxJ-WDJPTjB4QmhmcTQ (JEPC Board) (Hindi Medium)
[Contributor - Kripa S]
(Source -Smart Learning for All)
https://www.youtube.com/watch?v=vt-SG7Pn8UU (English - Laws of reflection)
(Source - Bodhaguru)
https://www.youtube.com/watch?v=rCznJTP3cVQ (Hindi - light and shadows)
https://www.youtube.com/watch?v=Jo1UZgGTtUs (Hindi - properties of light)
[Contributor - Anu Nived]
http://images.tutorvista.com/cms/images/95/angle-of-incidence.png (angle of incidence and reflection)
http://aven.amritalearning.com/userfiles/1/image/16_5.jpg (reflection of light)
http://www.vacuumcoating.info/wp-content/uploads/2011/09/RW_Fig1-450x138.png (types of reflection)
http://angelgilding.com/media/wysiwyg/Angles90deg.jpg (multiple images)
https://s-media-cache-ak0.pinimg.com/236x/4b/39/25/4b39250884cd07e52eabdd94ce95f4cc.jpg (Human eye)
http://fontmeme.com/images/Braille-Alphabet-550x466.png (braille system)
[Contributor - Arshea Bimal]
1. https://www.youtube.com/watch?v=A1Fxa_JI1HQ (what lenses and mirrors do with light)
2. https://www.youtube.com/watch?v=iPUXgOKSUpg (sunlight your home)
3. It is possible to cast multiple shadows of an object at the same time. Try to understand how this can be done and try to create this on your own. Observe the intensity of the shadow in this case. Observe the players in a day-night cricket match.
4. Observe and understand how and why the length of the shadow of a light pole changes during the day.
[Contributor - Amitesh Patara]
https://drive.google.com/open?id=0BzNF2YyqQxJ-STMwMTZHbk1sdzg (answer key)
[Contributor - Deepali Pandey]
https://drive.google.com/open?id=0B4m07xnDF8JpLXRhWWVNM09PYk0 (ppt)
[Contributor - Fathima Nazar]
| Term | Transliterated Term | Translated Term |
| ANGLE OF INCIDENCE | ऑंगल ऑफ़ इन्सिडेन्स | आपतन कोण |
| ANGLE OF REFLECTION | ऑंगल ऑफ़ रिफ्लेक्शन | परावर्तन कोण |
| BLIND SPOT | ब्लाइंड स्पोट | अंध बिंदु |
| BRAILLE | ब्रेइल | अंधों के पढ़ पाने के लिए उभरा |
| CONES | कोन्स | शंकु |
| CORNEA | कॉर्निया | स्वच्छ मंडल |
| DIFFUSED/ IRREGULAR REFLECTION | दिफ्फ्यूज़्ड / इरेगुलर रिफ्लेक्शन | विसरित / अनियमित परावर्तन |
| DISPERSION | डिस्पेरशन | विक्षेपण |
| INCIDENT RAYS | इंसिडेंट रेज़ | आपतित किरण |
| IRIS | आईरिस | परितारिका |
| KALEIDOSCOPE | कलेइडोस्कोप | बहुमूर्तिदर्शी |
| LATERAL INVERSION | लाटेरल इन्वेर्शन | पार्श्व परिवर्तन |
| LAWS OF REFLECTION | लौस ऑफ़ रिफ्लेक्शन | परावर्तन के नियम |
| PUPIL | प्यूपिल | पुतली |
| REFLECTED RAYS | रिफ्लेक्टेड रेज़ | परावर्तित किरण |
| REFLECTION | रिफ्लेक्शन | परावर्तन |
| REGULAR REFLECTION | रेगुलर रिफ्लेक्शन | नियमित परावर्तन |
| RETINA | रेटिना | दृष्टि पटल |
| RODS | रोडस | शलाका |
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