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WorksheetsLight class 7
Total questions: 30
Worksheet time: 34mins
Latha is observing her image in a plane mirror. The distance between the mirror and her image is 6 m. If she moves 2m towards the mirror then the distance between latha and her image will be
8 m
4 m
10 m
5 m
Images that can't be captured on a screen are called
Real image
Virtual image
Proper image
Imaginary image
Convex lens is also called as
Diverging lens
Converging lens
Plane lens
Power lens
What kind of image formed by concave lens?
Virtual
Real
Both
None
As the distance of the object from the mirror increases the distance of the image also increases
True
False
Both
None
When you shine sunlight through a magnifying glass onto a piece of paper, you can sometimes set the paper on fire. Why does this happen?
The glass of the magnifier heats up.
The energy of the Sun is focused in one small place.
The energy of the Sun is spread out over the whole piece of paper.
Sunlight sets everything on fire if it sits still long enough.
7. When light bounces off a mirror, it is __________.
Absorbed
Reflected
Corrected
Refracted
What type of mirror do dentists usually use to see clearly the images of our teeth?
plane mirror
convex mirror
concave mirror
none of the above
What kind of image is formed by concave lenses?
always real
always virtual
could be real or virtual; depend on the distance of the object from the focal point
could be real or virtual, but always real when the object is placed at the focal point
Sun's rays are observed to focus at a point behind a lens. What kind of lens was used?
converging lens
diverging lens
focusing lens
none of the above
The bowl of a shiny spoon forms an enlarged, upright image similar to that of a ____ mirror.
wide-angle
convex
concave
refracting
____ are thick in the middle and thin at the edges.
Plane mirrors
Convex lenses
Concave lenses
Concave mirrors
Which of these is not true about a real image?
It is enlarged
It can be projected onto a screen
It is inverted
It appears behind the mirror
What kind of image formed by concave lens?
Virtual
Real
Both
None
How can we see non-luminous things?
They emit light and it travels to our eyes.
Light reflects from them and it bounces to our eyes.
We see them because our eyes transmit light.
