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Lenses

Total questions: 19

Worksheet time: 15mins

Name
Class
Date
1.

Lenses are used to study

a)

Reflection

b)

Refraction

c)

Dispersion

d)

Scattering

2.
What does the word "converging" mean?
a)
to separate
b)
to come together
c)
parallel 
d)
perpendicular
3.
A converging lens is also known as a ____ lens.
a)
convex
b)
concave
c)
double
d)
refracted
4.
A diverging lens is also known as a ____lens.
a)
refracted
b)
diffracted
c)
convex
d)
concave
5.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
6.
This image is...
a)
Inverted and smaller
b)
inverted and bigger
c)
not inverted and smaller
d)
not inverted and bigger
7.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
8.
Which describes a convex lens?
a)
triangular in shape
b)
more transparent in the middle
c)
thicker on the edges than in the middle
d)
thicker in the middle than on the edges
9.
What type of lens do humans have in their eyes? 
a)
Concave Lens 
b)
Convex Lens 
10.
What type of image is formed when rays of light actually intersect?
a)
real
b)
virtual
c)
projected
d)
curved
11.

What do a prism, a magnifying glass, a microscope, and eyeglasses ALL have in common.

a)

They are opaque

b)

They refract light

c)

They reflect light

d)

That are translucent

12.

Which image CORRECTLY shows how light behaves when it travels from air through glass?

a)
b)
c)
d)
13.
A _______ breaks white light into colors.
a)
prism
b)
visible spectrum
c)
shadow
d)
lens
14.
When all light can pass through an object, that object is:
a)
translucent
b)
transparent
c)
opaque
d)
reflected
15.
A ___ lens makes objects appear bigger.
a)
concave
b)
convex
c)
prism
d)
flat
16.
An incident ray that is parallel to the principal axis...
a)
will reflect parallel to the principal axis
b)
will refract through the focal point
c)
will reflect through the center of curvature
d)
will continue along the same path through the lens
17.
What is Nearsightedness? 
a)
condition that has difficulty seeing things that are close 
b)
condition that has difficulty seeing things that are far away
18.

When will total internal reflection occur?

a)

When light travels from a less dense to a more dense medium

b)

When the angle of incidence is smaller than the critical angle

c)

When the angle of incidence is greater than the critical angle

d)

When the light cannot pass through a medium

19.

The above image is an example of a ____________. They happen because cool and hot air have a different ___________________________.

a)

Mirage; angle of incidence

b)

Optical fibre; refractive index

c)

Lateral inversion; angle of reflection

d)

Mirage; refractive index