Lenses - Questions

Lenses
































A lens which is thick in the middle and thin around the edges

(A) brings parallel light rays together.
(B) spreads parallel light rays apart.
(C) brings all light rays together.
(D) spreads all light rays apart.

Questions --- What this question is about
106.1
































A lens which is thick in the middle and thin around the edges

(A) brings parallel light rays together.

Yes. ---- They all pass through a focal point.

Check the other answers.
Questions --- What this question is about
106.1
































A lens which is thick in the middle and thin around the edges

(B) spreads parallel light rays apart.

No. --- that would require a lens which is thin in the middle,

Try again.
Questions --- What this question is about
106.1
































A lens which is thick in the middle and thin around the edges

(C) brings all light rays together.

No. --- No lens can do that.

Try again.
Questions --- What this question is about
106.1
































A lens which is thick in the middle and thin around the edges

(D) spreads all light rays apart.

No. --- No lens can do that.

Try again.
Questions --- What this question is about
106.1
































A lens which is thin in the middle and thick around the edges

(A) brings parallel light rays together.
(B) spreads parallel light rays apart.
(C) brings all light rays together.
(D) spreads all light rays apart.

Questions --- What this question is about
106.2































A lens which is thin in the middle and thick around the edges

(A) brings parallel light rays together.

No. --- that would require a lens which is thick in the middle,

Try again.
Questions --- What this question is about
106.2
































A lens which is thin in the middle and thick around the edges

(B) spreads parallel light rays apart.

Yes. --- The rays appear to come from a point.

Check the other answers.
Questions --- What this question is about
106.2
































A lens which is thin in the middle and thick around the edges

(C) brings all light rays together.

No. --- No lens can do that.

Try again.
Questions --- What this question is about
106.2
































A lens which is thin in the middle and thick around the edges

(D) spreads all light rays apart.

No. --- No lens can do that.

Try again.
Questions --- What this question is about
106.2

































Consider a mirror shaped like a shallow bowl. When light strikes this mirror from the top (into the bowl), the mirror acts like

(A) a diverging lens.
(B) a pinhole camera.
(C) a flat mirror.
(D) a converging lens.

Questions --- What this question is about
106.3

































Consider a mirror shaped like a shallow bowl. When light strikes this mirror from the top (into the bowl), the mirror acts like

(A) a diverging lens.

No. The light would need to strike from the bottom for that.

Try again.
Questions --- What this question is about
106.3

































Consider a mirror shaped like a shallow bowl. When light strikes this mirror from the top (into the bowl), the mirror acts like

(B) a pinhole camera.

No. --- No film.

Try again.
Questions --- What this question is about
106.3

































Consider a mirror shaped like a shallow bowl. When light strikes this mirror from the top (into the bowl), the mirror acts like

(C) a flat mirror.

No. --- Parallel rays are not reflected in parallel directions.

Try again.
Questions --- What this question is about
106.3

































Consider a mirror shaped like a shallow bowl. When light strikes this mirror from the top (into the bowl), the mirror acts like

(D) a converging lens.

Yes. --- Parallel rays are brought to a focus.

Check the other answers.
Questions --- What this question is about
106.3