LAW OF REFLECTION –  “Magic of Mirror”

Experiment Video:

Explains in a simple term, how reflection works. How do we see our face when we look into the mirror? Ever wondered why? And wanted to know, then come on.

 

  Tips: 
Howdy, young scientist! How was your day? And have you enjoyed the above video?  You have seen that mirror reflect the image. Do you want to know, what other materials will reflect the image? Feeling curious! Then its time for your white coat. Use different things and find out which material was reflecting. As you know, scientist always keeps a record of his work. To help you with this, feel free to use the following freebie. Law of reflection – Experiment (Free Download)                                                                                      

Reasoning:

  • When ray/light (all objects emits ray ) hits the smooth polished surface(water, mirror, glass, steel plate etc) it will bounce back the ray. Thus reflection works. Like a ball hits the wall and bounce back.
  • But why some object like water, mirror, glass, steel plate etc reflect and other like wood, wall, brick etc not. It is because the wood, brick, wall has a rough surface and therefore cannot reflect.
  • Once the light/ray hits the surface off a silver mirror, the light cannot travel through the silver (a paste-like substance painted at the back of the mirror), but the silver also cannot absorb the light. As a result, the light “bounces off” of the surface of the silver and returns to your eye, which is why you can see yourself in a mirror.
  • We would not be able to see anything at all – tree, car, school, friends everything else in the world without the reflected light.
  • Wonder why we cant see in the dark, because of lack of light for reflecting surface to reflect it.

Scientific Learning:

Light reflects from a smooth surface at the same angle as it hits the surface. For a smooth surface, reflected light rays travel in the same direction. This is called specular reflection.

 

 

For a rough surface, reflected light rays scatter in all directions. This is called diffuse reflection. Like we see in this picture, where this water droplet disturbs the base water thus the reflection was scattered.

 


Vocabulary:

Reflection:  he throwing back by a body or surface of light, heat, or sound without absorbing it

Ray:  each of the lines in which light (and heat) may seem to stream from the sun or any luminous body, or pass through a small opening

Diffuse:   lacking clarity or conciseness

Specular:    relating to or having the properties of a mirror

Scatter: throw in various random directions


 

  Reference:

  • Manipulating Light: Reflection, Refraction, and Absorption By Darlene R. Stille

  • Scholastic Learning Express L2: Time and Measurement

https://www.youtube.com/watch?v=ftB5VU64yGA                                https://www.youtube.com/watch?v=zsv7bYSrzMU

 


I am scientist

I am scientist is a result of small effort to make huge impact on children. To stimulate the curiosity of young scientist towards science. Each idea will start with a experiment followed by reasoning the result , scientific learning, vocabulary (recap the big words used), useful reference website and books, along with free downloadable worksheets.

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