Podcast
Questions and Answers
What is the defining characteristic of a convex lens?
What is the defining characteristic of a convex lens?
- Thinner at the centre compared to the edges
- Always results in light reflection
- Bound by two concave surfaces
- Thicker at the centre compared to the edges (correct)
How many times does a ray of light get refracted when passing through a lens?
How many times does a ray of light get refracted when passing through a lens?
- Once
- Three times
- Depends on the thickness of the lens
- Twice (correct)
Which type of lens is thinner at the centre compared to its edges?
Which type of lens is thinner at the centre compared to its edges?
- Concave lens (correct)
- Double concave lens
- Convex lens
- Double convex lens
What is the main function of lenses in spectacles?
What is the main function of lenses in spectacles?
Which surfaces are parts of a sphere in most lenses?
Which surfaces are parts of a sphere in most lenses?
What is the defining characteristic of a concave lens?
What is the defining characteristic of a concave lens?
Which point inside a lens allows light rays to pass through without changing their path?
Which point inside a lens allows light rays to pass through without changing their path?
What is the imaginary line passing through both centres of curvature called?
What is the imaginary line passing through both centres of curvature called?
If light rays parallel to the principal axis converge after passing through a lens, what type of lens is it?
If light rays parallel to the principal axis converge after passing through a lens, what type of lens is it?
What is the distance between the optical centre and principal focus of a lens called?
What is the distance between the optical centre and principal focus of a lens called?
In a lens with both surfaces spherical, how many centres of curvature are there?
In a lens with both surfaces spherical, how many centres of curvature are there?
What do light rays parallel to the principal axis do after passing through a concave lens?
What do light rays parallel to the principal axis do after passing through a concave lens?
