Ava (7) asks “Why do mirrors change words ?”


Ava, can you see how the image of the dog in the mirror is different from the dog. Look at the dogs raised ear. What side of the head is it on? NOW imagine you are the dog in the mirror, what side of the head is the raised ear on.

Try this, look in a mirror and point your right finger at the mirror. Now try to put yourself in the position of you in the mirror and what side of you is your finger. Is it your right finger or left finger, in the mirror???  Wow. The mirror has inverted your image (the dictionary says inverted means  – put upside down or in the opposite position.)

Now try a mirror with some words. Try it with this word  Mirror Me. Write it on a piece of card or paper and look at it in a mirror. What does it look like …..is it like this?

Think about what you are seeing. Why can you see the image in the mirror? Think about reflection? This is a very difficult area of understanding BUT you can have a lot of fun with it.

Updated 12/6/17

“I know I can see myself in a mirror but why cannot I see myself in other things?” asks Isabella (8)

Many thanks team. I have some ideas about investigations that you could do at home. People say that light travels in straight lines. How can we test this idea. Firstly we need a source of light. How about a torch. 

Now we know that a torch sends out light in all directions but how do we know if it is travelling in a straight line? Think……..

Now lets ‘capture a little bit of the light from the torch. Let’s use a piece of card with a hole in it and see if we can make the light from the torch go through the hole.

Now what do we have to do to show that, the little beam of light coming through the hole is travelling in a straight line?
Supposing we had another piece of card with a hole in it in exactly the same spot do you think you could arrange it so that the little beam of light goes through the hole in the new piece of card?

Do the same for a third piece of card arranging it so the little beam goes through it’s hole. Now draw a line between the torch and the third hole. What do you notice?

Now lets quickly look at your question about not seeing reflections in materials that are not mirrors.

Reflections are wonderful things and they happen, or do not happen because light travels in straight lines. A reflection occurs when a beam of light bounces off a surface. You could set up your torch and card above to make a reflection, using a mirror or something flat and shiny.

Now do the same for a different type of surface.try it with a piece of material. What happens? Try with all sorts of flat surfaces – shiny metal (use flat aluminum foil and then crinkle it), cardboard, paper, plastic, water, leather……..
What do you notice? Maybe reflection requires a flat shiny surface? Think about the results.

“Is a shadow a reflection?” asks Jack (7)

Thank you team. Some excellent observations. You noticed that the shadow had no detail on it, no colour, no lines, no images of seeds in the fruit. It was just black. On a dark night, under street lights look at your shadow. Other than your shape what detail does it have? It changes now and again, but why?

Now the reflection? If you look into a mirror what do you see? Is it like your shadow? How different is it?

Look at the two images of the fruit. The first image of the the fruit is the ‘real’ image. What about the image just below it (on the shiny surface)? Is it the real image? How did it get there?

Think about this – where did it come from? Now think about your image in a mirror, where did that come from?

You can create you own image of a reflection and a shadow. Get a mirror and a small screen. Put the object on the mirror and the screen behind it and use a torch to shine on the object.

Jack, this a great question. Lot’s to think about. Do you want to ask another question? Then click on the Reply button below.

 

Abdur asked: I got lazer and pointed it in my tea.Then I looked up and I could see the reflection on the ceiling. Doesn’t only mirrors reflect things?

An interesting question Abdur. I asked my team to have a think about it and as usual they came up with more questions.

reflection

I think we could investigate some of the statements that my team came up with. If it was very dark would you be able to see the tree?  Think about why you see things. Do you see the tree because it creates it’s own light? Maybe it is not only mirrors that reflect light? Abdur saw the laser beam on the ceiling when he was shining it at the surface of his cup of tea. Maybe the ceiling can reflect light? You look at your hand and you can see it. Is it producing it’s own light or is it reflecting light?

I think you need to do an experiment. If you have access to a light detector (some schools have them) look at the light reflected from different surfaces. Try a mirror, try a white surface, try a leaf, try a black surface and see how much light the different surfaces reflect. Some cameras also have light meters.