14th Science

LIGHT   

Without light we wouldn´t be able to see, 

Everything that we see or use has some degree of visibility or invisibility. Here, we give you an elaborate comparison between different materials, based on their ability to pass or not pass light through them.

Translucent Vs. Transparent Vs. Opaque

Translucent

┗ A material through which light can pass partially.
┗ We can partly see through these objects. They can also be called partially-see-through objects.
┗ The color of this material depends on the amount of light absorbed, scattered, and reflected.
┗ An object on the other side of this material is visible to some extent.
┗ Consider the example of a frosted glass. We can barely see what’s outside the window. This is because the partially-absorbed light scatters in different directions. The image above represents the concept of translucency. Light is focused onto a frosted glass having thickness. It allows the light to pass through it diffusely.

List of Translucent Materials

Wax paper

Colored plastic bottle

Tracing paper

Frosted glass

Jelly

Paper cup

Cloud

Colored Balloon

Transparent

┗ A material through which light can pass completely.
┗ We can clearly see through these objects. They can also be called see-through objects.
┗ The color of this material depends on the light it emits.
┗ An object on the other side of this material is clearly visible.
┗ This concept can be best illustrated with the diagram represented in the image above  A wine glass contains red wine. A torch light focused onto the glass passes through it. Due to this, the color of the wine is visible too. This is because, all the colors of the spectrum of light are reflected by the glass. Thus, it is transparent.

List of Transparent Materials

Spectacle

Glass

Sand timer

Window

Computer screen

Prism

Fish tank

Camera Lens

Opaque

┗ A material through which light cannot pass at all.
┗ We cannot see through these objects. They can also be called not-see-through objects.
┗ The color of this material depends on the light it absorbs.
┗ An object on the other side of this material is not visible at all.
┗ Let us understand this concept through an example of a red-colored apple. When we look at it, red color is reflected. This is because, all the colors of the light spectrum are absorbed by the apple. No light is passed through the object. Thus, it is opaque.

List of Opaque Materials

Cardboard

Wooden cupboard

Metal

Cell phone

Flower pot

Dice

Monument

Motorbike

I think this is clear but if you want a video you can watch it

Now you can finish the activity 2 page 91. I know you are champions so you will finish easlily