EASY
10th CBSE
IMPORTANT
Earn 100

Which kind of lens is used to correct long-sightedness (hypermetropia)?

Important Questions on Refraction of Light

EASY
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 20
A student sitting at the back of a class is not able to see what is written on the blackboard. What defect of vision is he suffering from? Which lens (convex or concave) should be used to correct the defect?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 21
What is the main advantage of a contact lens over spectacles?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 1
Write Snell's law, explaining the meaning of the symbols used.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 2
What is a thin lens? What is the difference in construction between a convex and a concave lens?
EASY
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 3
Why is a convex lens called a converging lens and a concave lens, a diverging lens?
EASY
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 4
How do you conclude that a ray of light incident towards the optical centre of a thin lens is transmitted almost without any deviation?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 5
The focal length of a convex lens is f. How does the size of the image placed in front of it changes as the object is brought progressively closer to the focus from a distance which is just greater than 2f?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 2 - Refraction of Light>EXERCISES>Q 6
Assuming the principal axis as the x-axis and the optical centre as the origin, how will you determine the signs of the quantities u, v and f for a lens?