EASY
Earn 100

What is the focus of concave lens?

Important Questions on Refraction of Light

EASY
Science>Physics>Refraction of Light>Spherical Lenses
Write the role of lenses in our daily life.
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Write the two differences between convex and concave lens.
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Which type of lens will you apply for reading small letters of a dictionary?
EASY
Science>Physics>Refraction of Light>Spherical Lenses
A convex lens has a focal length of 15 cm. At what distance should an object be placed in front of the lens to get a real image of the same size of the object?
EASY
Science>Physics>Refraction of Light>Spherical Lenses
What is a lens? Name the two types of lens.
EASY
Science>Physics>Refraction of Light>Spherical Lenses

What are the types of spherical lenses? Describe the principal focus, aperture and the optical centre of a spherical lens.

EASY
Science>Physics>Refraction of Light>Spherical Lenses

Why is a convex lens called a convergent lens?

EASY
Science>Physics>Refraction of Light>Spherical Lenses
The central point of a lens is known as:
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Define the focal length of spherical mirror.
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Define the principal focus of a convex lens.
MEDIUM
Science>Physics>Refraction of Light>Spherical Lenses

The following diagram shows the use of an optical device to perform an experiment of light.

Question Image

As per the arrangement shown, the optical device is likely to be a _____.

EASY
Science>Physics>Refraction of Light>Spherical Lenses
If the lens is placed in water instead of air, how does its focal length change? 
MEDIUM
Science>Physics>Refraction of Light>Spherical Lenses

What is meant by the optical centre of a convex lens?

MEDIUM
Science>Physics>Refraction of Light>Spherical Lenses
Write any three differences between a convex lens and a concave lens.
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Which lens, thick or thin has greater focal length?
MEDIUM
Science>Physics>Refraction of Light>Spherical Lenses
Which type of lens is used in making telescopes-converging or diverging?
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Name the piece of transparent materials which have one or two spherical surfaces.
EASY
Science>Physics>Refraction of Light>Spherical Lenses
Which lens is used for correcting the long-sightedness?
EASY
Science>Physics>Refraction of Light>Spherical Lenses
With the help of a ray diagram, explain the following terms: optical centre of a convex lens.
HARD
Science>Physics>Refraction of Light>Spherical Lenses

How will the following be affected on cutting lens into two equal halves along the principal axis?

(a) focal length

(b) intensity of image formed by half lens.