Advertisements
Advertisements
प्रश्न
Given below is a diagram depicting a defect of the human eye, study the same and then answer the questions that follow:
(i) Name the defect shown in the diagram.
(ii) What are the two possible that cause this defect?
(iii) Name the type of lens used to correct this defect.
(iv) With the help of a diagram show how the defect shown above is rectified using a suitable lens.
Advertisements
उत्तर
(i) Myopia
(ii) Two possible reasons are
- Eye ball is lengthened from front to back.
- Lens is too curved.
(iii) Concave lens
(iv)
APPEARS IN
संबंधित प्रश्न
Which part of our body helps us in maintaining the body balance?
For human ears, the audible range is 20 Hz to 20,000 Hz.
Given below is a representation of a kind of pollution. Study the same and answer the questions that follow
(i) Name the kind of pollution.
(ii) List any three common sources of this pollution.
(iii) Mention three harmful effects of this pollution on human health.
(iv) Explain the term ‘Pollutant’.
(v) Name two soil pollutants
Name the following:
The ear ossicle attached to the tympanum.
With reference to the human ear, answer the question that follow:
Give the technical term for the structure found in the inner ear.
Name the three tiny bones present in the middle part of ear.
Given below is a diagram of a part of the human ear. Study the same and answer the question that follow:
State the functions of the parts labeled 'A' and 'B'.
Verify experimentally the laws reflection of sound.
The Eardrum moves inward when a rarefaction reaches it.
The figure given below shows the principal parts of a human ear. Study the diagram and answer the following questions.
 |
- Label the parts 1 to 8.
- State the role of parts 6, 7 and 8.
- Why is it harmful to use a sharp object to remove ear wax? Mention the number and name of the part involved.
