Lenses (Leaving Cert Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are lenses made of?
What are lenses made of?
Curved pieces of transparent material
How can you identify a converging lens by its shape?
How can you identify a converging lens by its shape?
It is thicker in the middle
What is the shape characteristic of a diverging lens?
What is the shape characteristic of a diverging lens?
Thinner in the middle than at edges
What is the optic centre of a lens?
What is the optic centre of a lens?
Point where light passes without bending
What is the principal focus of a lens?
What is the principal focus of a lens?
Point where parallel rays converge to
What is the focal length of a lens?
What is the focal length of a lens?
Distance from optic centre to focus
What does a shorter focal length indicate about a converging lens?
What does a shorter focal length indicate about a converging lens?
Greater converging power
What happens when parallel light rays pass through a converging lens?
What happens when parallel light rays pass through a converging lens?
They meet at the principal focus
Where is the virtual focus of a diverging lens located?
Where is the virtual focus of a diverging lens located?
Same side as incoming light
What happens to a ray passing through the optic centre of a converging lens?
What happens to a ray passing through the optic centre of a converging lens?
It continues straight without bending
What happens to a ray parallel to the principal axis through a converging lens?
What happens to a ray parallel to the principal axis through a converging lens?
It passes through the principal focus
What happens to a ray through the focus before hitting a converging lens?
What happens to a ray through the focus before hitting a converging lens?
It emerges parallel to principal axis