Chapter 11: Roshni: Chhaaya aur Paraavartan
Chaand kyun chamakta, chhaaya kaali kyun, aur AMBULANCE ulta kyun likha? Is chapter mein deeptimaan aur adeeptimaan baantenge, dikhaayenge roshni seedhi chalti, paardarshi, paarbhaasi aur apaardarshi padaarth jaanchenge, chhaaya se khelenge, darpan pratibimb aur paarshv vyutkraman samjhenge, aur pinhole camera, periscope aur kaleidoscope banaayenge.
Is chapter mein tum
- deeptimaan aur adeeptimaan pehchaanna
- dikhaana roshni seedhi chalti aur chhaaya samjhaana
- samtal darpan ke pratibimb batana
- pinhole camera, periscope aur kaleidoscope samjhaana
Topics
- Roshni ke Srot aur Uska Chalna NCERT 11.1–11.3
Deeptimaan apni roshni dete; Chaand sirf dhoop lautaata.
- Chhaaya Banna NCERT 11.4
Chhaaya wahaan jahaan apaardarshi vastu roshni rokti; srot, vastu aur screen chahiye.
- Paraavartan aur Darpan ke Pratibimb NCERT 11.5–11.6
Paraavartan darpan ya chamakti sataah par roshni ki disha badalna.
- Pinhole Camera, Periscope aur Kaleidoscope NCERT 11.7–11.8
Pinhole camera ulta pratibimb banaata kyunki roshni seedhi chalti.
Key words
- Luminous
- apni roshni deta
- Translucent
- kuch roshni paar
- Opaque
- roshni poori rokta
- Shadow
- kaala kshetra jahaan vastu roshni rokti
- Reflection
- darpan par roshni ki disha badalna
- Lateral inversion
- darpan pratibimb mein baayein-daayein ki adla-badli
- Pinhole camera
- chhote chhed wala dibba jo ulta pratibimb deta
Summary
- Deeptimaan roshni banaate; Chaand dhoop lautaata; roshni seedhi chalti.
- Paardarshi, paarbhaasi aur apaardarshi saari, kuch ya koi roshni nahi jaane dete.
- Chhaaya ko srot, apaardarshi vastu aur screen; maap sthiti par.
- Samtal darpan pratibimb seedha, same maap aur paarshv ulta; pinhole camera ka ulta.