Lenses & ray diagrams (Edexcel GCSE Physics): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
How do lenses change images?
How do lenses change images?
By refracting light
What is the shape of a convex lens?
What is the shape of a convex lens?
Thicker in middle than at edges
What is the principal focus of a convex lens?
What is the principal focus of a convex lens?
Point where refracted light converges
What is focal length?
What is focal length?
Distance from lens centre to focus
For a convex lens, where does a ray parallel to the axis go after refraction?
For a convex lens, where does a ray parallel to the axis go after refraction?
Through the principal focus
What is the shape of a concave lens?
What is the shape of a concave lens?
Thicker at edges, thinner in centre
What happens to light passing through a concave lens?
What happens to light passing through a concave lens?
It diverges (spreads out)
Where is a real image formed?
Where is a real image formed?
When light comes together
Which type of lens produces real images?
Which type of lens produces real images?
Only convex/converging lenses
What is a virtual image?
What is a virtual image?
Formed when light rays diverge
What type of images do concave lenses always produce?
What type of images do concave lenses always produce?
Virtual images
What is the normal in a ray diagram?
What is the normal in a ray diagram?
Line perpendicular to the boundary
How does light refract when entering a more optically dense material?
How does light refract when entering a more optically dense material?
Bends towards the normal