English

Your Friend Can Read a Book Perfectly Well but Cannot Read the Writing on Blackboard Unless She Sits on the Front Row in Class. Is She Short-sighted Or Long-sighted? - Science

Advertisements
Advertisements

Question

Your friend can read a book perfectly well but cannot read the writing on blackboard unless she sits on the front row in class. 

 Is she short-sighted or long-sighted?

Advertisements

Solution

She is short-sighted.

shaalaa.com
  Is there an error in this question or solution?
Chapter 6: The Human Eyes And The Colorful World - Exercise 2 [Page 279]

APPEARS IN

Lakhmir Singh Physics (Science) [English] Class 10
Chapter 6 The Human Eyes And The Colorful World
Exercise 2 | Q 17.1 | Page 279

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Given below is a diagram showing a defect of human eye. Study it and answer the following questions.

(i) Name the defect shown in the figure.
(ii) Give reason for this defect of eye in human being.
(iii) Name the type of lens used to correct the eye defect.


List three common refractive defects of vision. Suggest the way of correcting these defects.


Name the defect of vision which makes the eye-lens cloudy resulting in blurred vision.


What is the far point of a person suffering from myopia (or short-sightedness)?


Where is the near point of a person suffering from hypermetropia (or long-sightedness)?


A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called:
(a) cataract
(b) hypermetropia
(c) myopia
(d) presbyopia


Which part of the eye is grafted in a needy patient from a donated eye?


Differentiate between members of the following pair with reference to what is asked in the bracket.

Rods and cones (sensitivity).


What is meant by optical illusion? Give one example.


List two causes of presbyopia. Draw labelled diagram of a lens used for the correction of this defect of vision. 


Distinguish between the following pair of words:
Myopia and hypermetropia


Differentiate between:

Myopia and Hypermetropia.


Explain the Term: Hypermetropia


Explain the Term: Presbyopia


Study the following diagram carefully and then answer the questions that follow. The diagram is depicting a defect of the human eye :

(i) Identify the defect shown in the diagram.
(ii) Give two possible reasons for the above defect.


In Myopia the human eye _______.


Given below is a diagram showing a defect of vision. Name the defect of vision and draw an accurately labelled diagram to correct this defect.


Myopia may arise due to ____________.


State reasons for Myopia. With the help of ray diagrams, show the:

  1. image formation by a myopic eye, and
  2. correction of myopia using an appropriate lens.

Have a look at the posture of this girl who is reading a book and answer the questions which follow:

  1. Name the problem she is facing.
  2. What are the two conditions shown in sections A and B of the eye as applicable to her.
  3. What kind of reading glasses does she need?
A B

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×