Light Blog 5

CLASS 8 CHAPTER 16
Light
Day 5


Dear Learners,

In the previous blogs, we have learned about light. Let me help you to recall few important points that were discussed in previous blogs.

1. Luminous and Non-luminous objects.
2. Laws of reflections.
3. Regular and Irregular reflection.
4. Real and Virtual Image.
5. Formation of images by plane mirror.
6. Ray diagram for the formation of image by plane mirror.
7. Characteristic of image by a plane mirror

 Today, we will be learning about formation of Multiple Images and uses of plane mirror.

 Happy Learning!😊

At the end of it, you will be able to:
1. explain formation of multiple images.
2. tell the uses of plane mirror.

Before, we start the chapter you all should read page no 254, 255 of your text book. By doing this, it will be easier for you all understand the topic well.

So, lets start the topic.........

MULTIPLE IMAGES 

I hope everyone have visited Salon for hair cut. How many images are seen???
You get to see many image formed form single object. Don't you think it is unique. 


When two mirrors are placed inclined at an angle to each other many images of the object placed before them are seen. This because  the image formed in one mirror acts as the object for the other.


Do you know???  

1. The number of images seen depends upon the angle at which the two mirror are placed. 
2. When the two mirror are placed parallel to each other, a very large number of images are seen.
3. When the mirrors are placed at right angle to each other, three images of the object are seen.
4. To find out how many images are formed when plane mirrors are tilted at an angle, use the formula N=360/a-1 , wherein N is the number of images formed and a is the given angle.

When the two mirror are placed at right angles to each other

When an object is placed in front of two plane mirrors placed at right angles to each other, three images are formed.


When the two plane mirrors are placed parallel to each other

This process of image formation continues and infinite number of images are formed in the mirror. Only first few images are sharp and can be seen clearly.



USES OF PLANE MIRROR

Plane mirror are commonly used 

1. as a dressing mirror or looking mirror.
2. for making kaleidoscope and periscope.
3. as a reflector in solar cooker


Home Assignment
1. Read page no 254, 255.
2. Try to do oral question no 1, 2, given on page 256


Comments

  1. ARSH NATH April 27, 2020 at 7:22 PM

    Good morning sir
    I am ARSH NATH
    ROLL NO 23
    CLASS 8E

    ReplyDelete
  2. ManvendraMay 1, 2020 at 7:19 AM

    Good morning sir, Manvendra here.

    ReplyDelete
  3. Aaryan SainiMay 1, 2020 at 7:21 AM

    Good Morning Sir,
    I am Aaryan Saini
    Roll number - 31

    ReplyDelete
  4. Pall anandMay 1, 2020 at 7:30 AM

    Good morning sir I am Pall Anand
    8E
    Roll no.6

    ReplyDelete
  5. Alan RoyMay 1, 2020 at 7:31 AM

    Good morning sir I am Alan Roy roll no.28

    ReplyDelete
  6. Dakshesh PilaniaMay 1, 2020 at 7:32 AM

    good morning sir
    I am Dakhesh

    ReplyDelete
  7. Shaun steniMay 1, 2020 at 7:32 AM

    Good morning sir My name is Shaun Steni 8 E roll no 44

    ReplyDelete
  8. Aman ShekharMay 1, 2020 at 7:32 AM

    Good morning sir I am Aman Shekhar

    ReplyDelete
  9. Chetan chandelMay 1, 2020 at 7:33 AM

    Good morning sir , I am Lakshay Chandel

    ReplyDelete
  10. AVI SURANAMay 1, 2020 at 7:33 AM

    Good Morning Sir I am Avi Surana

    ReplyDelete
  11. Maulik JainMay 1, 2020 at 7:35 AM

    Good Morning Sir,
    I Am Maulik Jain

    ReplyDelete
  12. AnonymousMay 1, 2020 at 7:36 AM

    Good morning sir I am chirag of class 8E

    ReplyDelete
  13. Ayush jainMay 1, 2020 at 7:37 AM

    Good morning sir I am Ayush Jain

    ReplyDelete
  14. Aditya SinghMay 1, 2020 at 7:38 AM

    Good morning sir I'm Aditya Singh Roll no 36

    ReplyDelete
  15. Anirudh TrivediMay 1, 2020 at 7:39 AM

    Good morning Sir
    I am Anirudh Trivedi

    ReplyDelete
  16. N.RakaloMay 1, 2020 at 7:41 AM

    Good morning sir. I am N.Rakalo

    ReplyDelete
  17. N.RakaloMay 1, 2020 at 7:42 AM

    Sir do we have to write the part written in red ?

    ReplyDelete
  18. Aryan PuriMay 1, 2020 at 7:52 AM

    Good Morning Sir,
    Aryan Puri here!

    ReplyDelete
  19. Seerat pal singhMay 1, 2020 at 7:58 AM

    Good morning I am seerat pal singh 8E roll no 41

    ReplyDelete
  20. Lovely SinghMay 1, 2020 at 8:01 AM

    Good morning sir I am
    Pranav Singh roll no 37

    ReplyDelete
  21. Taksh SinghalMay 1, 2020 at 8:03 AM

    Good morning sir . I am Taksh Singhal

    ReplyDelete
  22. NavyeMay 1, 2020 at 8:05 AM

    Good Morning sir
    I am Navye Malhotra

    ReplyDelete
  23. Shreyansh AgarwalMay 1, 2020 at 8:11 AM

    Good morning sir , I am Shreyansh Agarwal

    ReplyDelete
  24. AnonymousMay 1, 2020 at 8:13 AM

    Good morning sir Arnav Daga here

    ReplyDelete
  25. RemMay 1, 2020 at 8:20 AM

    Good morning sir.
    Remthanglien Aomar Varte here

    ReplyDelete
  26. Cyril MartinMay 1, 2020 at 8:28 AM

    GM Sir
    Cyril Martin Roll No.20

    ReplyDelete
  27. Justin RussellMay 1, 2020 at 8:34 AM

    Good morning Sir I am Justin Russell

    ReplyDelete
  28. Falit Mittal.May 1, 2020 at 8:51 AM

    Good morning sir. I am Falit Mittal.

    ReplyDelete
  29. Cyril MartinMay 1, 2020 at 9:09 AM

    This comment has been removed by the author.

    ReplyDelete
  30. Rudra sethiMay 1, 2020 at 9:26 AM

    Good morning ma'am I am rudra sethi

    ReplyDelete
  31. AarnavMay 1, 2020 at 9:44 AM

    Good morning sir
    I am Aarnav Sareen

    ReplyDelete
  32. AnshMay 1, 2020 at 9:54 AM

    ansh

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  33. Aditya AggarwalMay 1, 2020 at 10:10 AM

    Good Morning sir
    I am Tanish Aggarwal
    8-E

    ReplyDelete
  34. Keshav vermaMay 1, 2020 at 11:19 AM

    Good Morning sir,
    I am Keshav Verma roll no.50

    ReplyDelete
  35. Naman KalraMay 1, 2020 at 12:43 PM

    Good Morning sir, I am Naman Kalra

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