MEDIUM
Earn 100

Name any two optical instruments which uses convex lens.

Important Questions on Lenses

MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Which of the following lens would you prefer to use while reading small letters found in a dictionary?
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
The image formed by a convex lens is inverted, magnified and real, when an object is kept between the lens and the focus.
MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Explain the working of an astronomical telescope using refraction of light.
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Which type of lens is used to make fire with during day time?
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
A convex lens usually magnifies images.
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments

Give reasons for the following:
Convex lens is used in a magnifying glass.

EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Draw a ray diagram when the object is placed between optical center and principal focus of a convex lens.
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
A lens forms a magnified, erect and virtual image when an object is placed very close to it. Identify the lens.
MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments

Look at the ray diagrams given below. State, whether the images formed, will be real or virtual.

Question Image

MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
List the properties of image formed by a convex lens.
HARD
Science>Physics>Lenses>Uses of Lenses and Optical Instruments

State the position and nature of the image formed by a convex lens for the following position of the object:

Between O and F

MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
At what position of the object does a convex lens act as a magnifying glass?
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Give reasons for the following.
Lemons kept in a glass of water appear enlarged.
MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
A girl sees a magnified image of a closely kept object by holding a simple, clear glass device in her hand. This device is likely to be a
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments

State three characteristics of the image formed by a convex lens when the object is close to it.

EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Which of the following can produce a virtual image?
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Cotyledons are also called-
MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
The image formed by a convex lens is real, inverted and magnified when an object is kept between the lens and the focus.
EASY
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
Draw a ray diagram for the formation of an image by a convex lens when the object is placed very near to it.
MEDIUM
Science>Physics>Lenses>Uses of Lenses and Optical Instruments
When does a convex lens form a virtual image? Is the virtual image bigger or smaller than the object?