visible light

Where does specular reflection take place

On smooth surfaces

Why does a blue object appear black through a red filter

A blue object reflects blue light and absorbs most other colors. A green filter transmits green light but absorbs (or blocks) blue light. Therefore, the blue light reflected by the object cannot pass through the filter, so almost no light reaches the eye and the object appears black.

In speculative reflection how are the light rays reflected

In a single direction

What does specular reflection produce

An image

What is the reflection on rough surfaces called

Diffuse reflection

How are the light rays on rough surfaces

Scattered

What is white light a mixture of

All colours

Red orange yellow green blue indigo violet

Each colour has a narrow band of wavelength and frequency

What does the colour of an object depend on

Which wavelengths of light are reflected, transmitted or absorbed

How do coloured filters work

By absorbing specific wavelengths and transmitting other wave lengths

Explain what happens if white light shines on red filter

The filter absorbs all colours of visible light apart from red . So only red is transmitted through the filter

What two things can an object be that transmits light

Transparent or translucent

Why can we easily see through transparent objects but not translucent

Because translucent objects scatter the light rays so we cannot see they them clearly

What are objects we cannot see through called

Opaque

Why do black objects appear black

Because they absorb all the wavelengths of visible light

When white lightened on blue object what happens

All colours are being absorbed apart from blue which is being reflected

What happens if there is a red object and red filter

The red filter absorbs all of the colours of white light apart from red which is transmitted . The red light can now reflect off the red object so the object appears red