PHYSICS LAB EXAM 1 | QUESTIONS WITH VERIFIED
ACCURATE ANSWERS| 2026
convex lens - Answers - converging lens
Why do light rays bend? - Answers - When the light rays travel from one medium to
another they bend because light travels at a different speed in each medium.
what kind of lens corrects hyperopia? - Answers - converging/convex lens
magnificaiton - Answers - -di/do or -hi/ho
When an object is located very far from the lens what happens to the thin-lens
equation? - Answers - do goes to infinity and becomes zero
real image - Answers - image is on the same side as the outgoing light rays
When is a real image produced with a converging lens? - Answers - A real image is
produced when the object is farther from the lens than the focal point.
this can be projected on a screen
When is a virtual image produced by a converging lens? - Answers - A virtual image
produced when the object is closer than the focal length. The image is on the same side
as the object and con't be projected on the screen. You must look through the lens to
see it.
What happens if you cover half of the lens? - Answers - The image appears lighter but
is still complete. Half of the rays are blocked and thus less light is being put into the
image.
what does it mean if the magnification is negative? - Answers - The image is inverted
and on the opposite side of the lens as the object.
What happens if you remove the lens? will an image still form? - Answers - Once the
lens is removed there is no medium to change the speed of light to make the light rays
converge.
Light travels faster in ______ than __________ - Answers - air, glass
When will the thing-lens equation be more accurate for a converging lens? - Answers -
When an object is really far away rather than close. The larger the object distance gets
the closer to zero it actually is so the focal length will be more accurate.
, relationships of the thin-lens equation - Answers - the focal length for a lens is constant
because it is a physical property. Thus 1/f remains the same, so as object distance
decreases image distance increases.
what happens when you cover the light source? - Answers - The corresponding half
covered was not projected on the screen. The light rays were blocked and couldn't
refract to focus that part of the image. The closer we got to the object the side that
disappeared swithced.
When a converging lens object distance is greater than 2f.... - Answers - get a real,
smaller, inverted image
when is a focal length positive? - Answers - for a converging lens
when is a focal length negative? - Answers - for a diverging lens
determining focal length with di vs do graph - Answers - exponential graph so where the
asymptote is is where the focal length is. this is where the image distance is infinite and
thus 0 and this occurs only when the object is at the focal point.
determining focal length with 1/di vs 1/do graph - Answers - determine one of the
intercepts where eitehr di or do=0 and then plug the other value into the thin-lens
equation. The y-intercept (1/do) is equal to 1/f.
When the object is at the focal point for a converging lens what does the image look
like? - Answers - there is no image formed because the rays never intersect
When the object is closer than the focal point for a converging lens what does the image
look like? - Answers - it is a virtual image behind the object, larger and upright.
When the object is farther than f but closer than 2f for a converging lens what does the
image look like? - Answers - It is a real, inverted enlarged image.
When is the only time you get an upright virtual image with a converging lens? -
Answers - if the object is closer than f
What happens to image size when using a converging lens compared to object
distance? - Answers - As the object distance decreased the image size increased. Thus
this made the magnification a larger negative value since image size increased while
object size remained the same.
relationship between power and focal length - Answers - a shorter focal length has a
larger power and thus bends the light rays a greater amount. it has a larger focusing
power.
ACCURATE ANSWERS| 2026
convex lens - Answers - converging lens
Why do light rays bend? - Answers - When the light rays travel from one medium to
another they bend because light travels at a different speed in each medium.
what kind of lens corrects hyperopia? - Answers - converging/convex lens
magnificaiton - Answers - -di/do or -hi/ho
When an object is located very far from the lens what happens to the thin-lens
equation? - Answers - do goes to infinity and becomes zero
real image - Answers - image is on the same side as the outgoing light rays
When is a real image produced with a converging lens? - Answers - A real image is
produced when the object is farther from the lens than the focal point.
this can be projected on a screen
When is a virtual image produced by a converging lens? - Answers - A virtual image
produced when the object is closer than the focal length. The image is on the same side
as the object and con't be projected on the screen. You must look through the lens to
see it.
What happens if you cover half of the lens? - Answers - The image appears lighter but
is still complete. Half of the rays are blocked and thus less light is being put into the
image.
what does it mean if the magnification is negative? - Answers - The image is inverted
and on the opposite side of the lens as the object.
What happens if you remove the lens? will an image still form? - Answers - Once the
lens is removed there is no medium to change the speed of light to make the light rays
converge.
Light travels faster in ______ than __________ - Answers - air, glass
When will the thing-lens equation be more accurate for a converging lens? - Answers -
When an object is really far away rather than close. The larger the object distance gets
the closer to zero it actually is so the focal length will be more accurate.
, relationships of the thin-lens equation - Answers - the focal length for a lens is constant
because it is a physical property. Thus 1/f remains the same, so as object distance
decreases image distance increases.
what happens when you cover the light source? - Answers - The corresponding half
covered was not projected on the screen. The light rays were blocked and couldn't
refract to focus that part of the image. The closer we got to the object the side that
disappeared swithced.
When a converging lens object distance is greater than 2f.... - Answers - get a real,
smaller, inverted image
when is a focal length positive? - Answers - for a converging lens
when is a focal length negative? - Answers - for a diverging lens
determining focal length with di vs do graph - Answers - exponential graph so where the
asymptote is is where the focal length is. this is where the image distance is infinite and
thus 0 and this occurs only when the object is at the focal point.
determining focal length with 1/di vs 1/do graph - Answers - determine one of the
intercepts where eitehr di or do=0 and then plug the other value into the thin-lens
equation. The y-intercept (1/do) is equal to 1/f.
When the object is at the focal point for a converging lens what does the image look
like? - Answers - there is no image formed because the rays never intersect
When the object is closer than the focal point for a converging lens what does the image
look like? - Answers - it is a virtual image behind the object, larger and upright.
When the object is farther than f but closer than 2f for a converging lens what does the
image look like? - Answers - It is a real, inverted enlarged image.
When is the only time you get an upright virtual image with a converging lens? -
Answers - if the object is closer than f
What happens to image size when using a converging lens compared to object
distance? - Answers - As the object distance decreased the image size increased. Thus
this made the magnification a larger negative value since image size increased while
object size remained the same.
relationship between power and focal length - Answers - a shorter focal length has a
larger power and thus bends the light rays a greater amount. it has a larger focusing
power.
