Question

What is the colour of the filter that can transmit blue and red colours of light?

• A. Cyan
• B. Magenta
• C. Yellow
• D. Green

Answer 1

The correct option is B

Magenta

Colour filters are transparent material which allows the passage of certain colours alone through them. Green, blue, and red filters allow only the respective colours to pass through them.
Yellow, cyan, and magenta filters allows their component colours also to pass through them.
On combining blue and red we get magenta as the secondary colour. Hence, the magenta colour filter will transmit the blue and red colour of light.