Tiwari Academy Discussion

Asked: October 20, 2020In: Class 10

An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.

NCERT Solution for Class 10 Science Chapter 10 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-186 Questions No-14

Saanvi Talwar

Asked: October 20, 2020In: Class 10

An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focussed image can be obtained? Find the size and the nature of the image.

NCERT Solution for Class 10 Science Chapter 10 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-186 Questions No-15

Saanvi Talwar

Asked: October 20, 2020In: Class 10

Find the focal length of a lens of power – 2.0 D. What type of lens is this?

NCERT Solution for Class 10 Science Chapter 10 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-186 Questions No-16

Saanvi Talwar

Asked: October 20, 2020In: Class 10

A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

NCERT Solution for Class 10 Science Chapter 10 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-186 Questions No-17

Chandan Guptas

Asked: October 20, 2020In: Class 10

What is meant by power of accommodation of the eye?

NCERT Solution for Class 10 Science Chapter 11 The Human Eye and the Colorful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-190 Questions No-1

Chandan Guptas

Asked: October 20, 2020In: Class 10

A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?

NCERT Solution for Class 10 Science Chapter 11 The Human Eye and the Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-190 Questions No-2

Chandan Guptas

Asked: October 20, 2020In: Class 10

What is the far point and near point of the human eye with normal vision?

NCERT Solution for Class 10 Science Chapter 11 The Human Eye and the Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-190 Questions No-3

Chandan Guptas

Asked: October 20, 2020In: Class 10

A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?

NCERT Solution for Class 10 Science Chapter 11 The Human Eye and the Colorful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-190 Questions No-4

Poll

Chandan Guptas

Asked: October 20, 2020In: Class 10

The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to

NCERT Solution for Class 10 Science Chapter 11 The Human Eye and the Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-197 Questions No-1

Poll

Chandan Guptas

Asked: October 20, 2020In: Class 10

The least distance of distinct vision for a young adult with normal vision is about

NCERT Solution for Class 10 Science Chapter 11 The Human Eye and the Colorful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-198 Questions No-3

An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.

An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focussed image can be obtained? Find the size and the nature of the image.

Find the focal length of a lens of power – 2.0 D. What type of lens is this?

A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

What is meant by power of accommodation of the eye?

A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?

What is the far point and near point of the human eye with normal vision?

A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?

The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to

The least distance of distinct vision for a young adult with normal vision is about

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