What do you call an educated light wave that can't be seen?

Category: Wordplay · Difficulty: easy

Hint: It's a play on words about intelligence and light.

Answer

A bright idea

Explanation

The phrase 'bright idea' refers to a clever thought, while 'bright' relates to light waves.

This is an easy wordplay riddle — a good one for children and beginners. The answer is A bright idea.

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