Images - Questions

Ray Tracing
Real images
Virtual images

The ray-tracing method of analyzing an optical system requires one to follow
(A) the rays from just one point
(B) all of the rays from all points
(C) one ray from each point
(D) a few rays from a few points
on the object.

The ray-tracing method of analyzing an optical system requires one to follow
(A) the rays from just one point
on the object.
No. --- Too many rays from not enough points..

The ray-tracing method of analyzing an optical system requires one to follow
(B) all of the rays from all points
on the object.
No. --- Too many rays from too many points.

The ray-tracing method of analyzing an optical system requires one to follow
(C) one ray from each point
on the object.
No. --- Too many points, not enough rays from each.

The ray-tracing method of analyzing an optical system requires one to follow
(D) a few rays from a few points
on the object.
Yes. --- A few well-chosen rays from points at the top and bottom, for example.

For the image of an object to be real, the light from each point of the object must
(A) appear to come from the image point.
(B) actually reach the image point.
(C) travel only in straight lines.
(D) stop at the image point.

For the image of an object to be real, the light from each point of the object must
(A) appear to come from the image point.
No. --- That would be true for any image point.

For the image of an object to be real, the light from each point of the object must
(B) actually reach the image point.
Yes. A screen or film would have to show a picture.

For the image of an object to be real, the light from each point of the object must
(C) travel only in straight lines.
No. --- The rays can bend or reflect.

For the image of an object to be real, the light from each point of the object must
(D) stop at the image point.
No. --- They could also pass through. A film or screen would form an image if it is put there.

Which of the following images is a virtual image?
(A) Objects seen through a window.
(B) Objects seen in a mirror.
(C) Pictures seen on a movie screen.
(D) The image on the film of a camera.

Which of the following images is a virtual image?
(A) Objects seen through a window.
No. --- The light really comes from those objects.

Which of the following images is a virtual image?
(B) Objects seen in a mirror.
Yes. --- the light does not really come from behind the mirror.

Which of the following images is a virtual image?
(C) Pictures seen on a movie screen.
No. --- The light really hits the screen.

Which of the following images is a virtual image?
(D) The image on the film of a camera.
No. --- The light actually hits the film.

Images - Questions Ray Tracing Real images Virtual images

The ray-tracing method of analyzing an optical system requires one to follow (A) the rays from just one point (B) all of the rays from all points (C) one ray from each point (D) a few rays from a few points on the object.

The ray-tracing method of analyzing an optical system requires one to follow (A) the rays from just one point on the object. No. --- Too many rays from not enough points..

The ray-tracing method of analyzing an optical system requires one to follow (B) all of the rays from all points on the object. No. --- Too many rays from too many points.

The ray-tracing method of analyzing an optical system requires one to follow (C) one ray from each point on the object. No. --- Too many points, not enough rays from each.

The ray-tracing method of analyzing an optical system requires one to follow (D) a few rays from a few points on the object. Yes. --- A few well-chosen rays from points at the top and bottom, for example.

For the image of an object to be real, the light from each point of the object must (A) appear to come from the image point. (B) actually reach the image point. (C) travel only in straight lines. (D) stop at the image point.

For the image of an object to be real, the light from each point of the object must (A) appear to come from the image point. No. --- That would be true for any image point.

For the image of an object to be real, the light from each point of the object must (B) actually reach the image point. Yes. A screen or film would have to show a picture.

For the image of an object to be real, the light from each point of the object must (C) travel only in straight lines. No. --- The rays can bend or reflect.

For the image of an object to be real, the light from each point of the object must (D) stop at the image point. No. --- They could also pass through. A film or screen would form an image if it is put there.

Which of the following images is a virtual image? (A) Objects seen through a window. (B) Objects seen in a mirror. (C) Pictures seen on a movie screen. (D) The image on the film of a camera.

Which of the following images is a virtual image? (A) Objects seen through a window. No. --- The light really comes from those objects.

Which of the following images is a virtual image? (B) Objects seen in a mirror. Yes. --- the light does not really come from behind the mirror.

Which of the following images is a virtual image? (C) Pictures seen on a movie screen. No. --- The light really hits the screen.

Which of the following images is a virtual image? (D) The image on the film of a camera. No. --- The light actually hits the film.

Images - Questions

Ray Tracing
Real images
Virtual images

The ray-tracing method of analyzing an optical system requires one to follow
(A) the rays from just one point
(B) all of the rays from all points
(C) one ray from each point
(D) a few rays from a few points
on the object.

The ray-tracing method of analyzing an optical system requires one to follow
(A) the rays from just one point
on the object.
No. --- Too many rays from not enough points..

The ray-tracing method of analyzing an optical system requires one to follow
(B) all of the rays from all points
on the object.
No. --- Too many rays from too many points.

The ray-tracing method of analyzing an optical system requires one to follow
(C) one ray from each point
on the object.
No. --- Too many points, not enough rays from each.

The ray-tracing method of analyzing an optical system requires one to follow
(D) a few rays from a few points
on the object.
Yes. --- A few well-chosen rays from points at the top and bottom, for example.

For the image of an object to be real, the light from each point of the object must
(A) appear to come from the image point.
(B) actually reach the image point.
(C) travel only in straight lines.
(D) stop at the image point.

For the image of an object to be real, the light from each point of the object must
(A) appear to come from the image point.
No. --- That would be true for any image point.

For the image of an object to be real, the light from each point of the object must
(B) actually reach the image point.
Yes. A screen or film would have to show a picture.

For the image of an object to be real, the light from each point of the object must
(C) travel only in straight lines.
No. --- The rays can bend or reflect.

For the image of an object to be real, the light from each point of the object must
(D) stop at the image point.
No. --- They could also pass through. A film or screen would form an image if it is put there.

Which of the following images is a virtual image?
(A) Objects seen through a window.
(B) Objects seen in a mirror.
(C) Pictures seen on a movie screen.
(D) The image on the film of a camera.

Which of the following images is a virtual image?
(A) Objects seen through a window.
No. --- The light really comes from those objects.

Which of the following images is a virtual image?
(B) Objects seen in a mirror.
Yes. --- the light does not really come from behind the mirror.

Which of the following images is a virtual image?
(C) Pictures seen on a movie screen.
No. --- The light really hits the screen.

Which of the following images is a virtual image?
(D) The image on the film of a camera.
No. --- The light actually hits the film.