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
For human ears, the audible range is 20 Hz to 20,000 Hz.
Differentiate between near vision and distant vision (Shape of the eye lens).
State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.
Semi-circular canals are concerned with static (positional) balance.
Write whether the following is true or false:
Vitreous chamber is present in ear in humans.
Name the following:
The ear ossicle in contact with the oval window of the inner ear.
Complete the following sentence with appropriate word :
________ is the organ of balance and hearing in the body.
Choose the Odd One Out:
Long answer question
Draw the neat labelled diagram of the human ear.
In the inner ear, the pressure variations are turned into electrical signals by the ______.
Assertion: Human beings Cannot hear infrasonic sounds.
Reason: Sound with a frequency less than 20 Hz is called infrasonic sound.
