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Light Book Back Questions & Answers, Exercises, Solutions, Tests, Quizzes, Videos and Podcasts for Class 7 | Unit 1 | Physics | Science | Samacheer Kalvi – English Medium

7th Standard Samacheer Kalvi Physics New Book Back Questions & Answers: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/light-3/exercises

Podcasts: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/light-3/videos

Tests & Quizzes: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/light-3/tests

Flash Cards: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/light-3/flashcards

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00:00 Introduction
00:12 Choose the correct answer
07:02 Fill in the blanks
10:12 True or false
12:15 Match the following

Questions answered in this video –

1. Light travels only in a_____ . It is because of this property that_____ are formed

2. Light that hits a mirror gets_____

3. _____Surface reflects the light well.

4. Light is a form of____

5. You can see your image in polished floors, but not in wooden table because_____

6. Choose the translucent substance from the following

7. Reflection occurs , when the light

8. Which of the following is the best reflector of light?

9. Sivarajan placed a meter stick in the playground at 7.00 am in the morning. How will the shadow of the stick at noon look in comparison to the one in the morning

10. The image formed by a pinhole camera is inverted because,

11. Which of the following facts explain how shadows are formed? a. Light travels in straight lines b. Opaque bodies do not allow light to pass through them c. Reflection occurs at a smooth surfaces like mirrors d. Lateral inversion happens

12. A plane mirror produces a ____________ image

13. A ____________ reflection helps us to see the objects

14. The light ray gets ____________ when it falls on any polished surface.

15. Sunlight is a blend of ____________ colors

16. The splitting of white light in to seven colors is called ____________

17. The moon ____________ sun light

18. The sunlight can be split into its constituent colors using ____________

19. Reflection of light from rough surface is called ____________ reflection

20. The image of right hand in a plane mirror looks like a left hand

21. Rainbow is formed by dispersion of which light by water drops

22. The image formed by the plane mirror is laterally inverted, hence the image seen through the periscope is also laterally inverted

23. We see planets because they reflect light from the sun

24. We see a book because it reflects the light that falls on its surface

25. The image formed in a pinhole camera is always inverted

26. The image formed in a pinhole camera is always the same size as the object

27. The image formed in a plane mirror is upside down

28. A plane mirror is opaque

29. A shadow is formed on the same side of the object as the source of light.

30. we are able to see things around us with the help of regular reflection

31. After passing through a prism, white light splits into a band of seven colours

32. Rectilinear propagation

33. Plane Mirror

34. Fire fly

35. The Moon

36. Wide light source

37. Regular reflection

38. The sun

39. Band of seven colors

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