Advertisements
Advertisements
प्रश्न
Briefly explain the following terms: Power of accommodation
Advertisements
उत्तर
Power of accommodation:
The ability of the eye to adjust itself and to focus objects at different distances is known as the power of accommodation. The ciliary muscles contract and make the lens thicker to view nearby objects clearly, whereas they relax and make the lens thinner to focus on distant objects.
APPEARS IN
संबंधित प्रश्न
Explain how the human ear works.
find odd one from following: Malleus, iris, Stapes, Incus.
With reference to the human ear, answer the question that follow:
Name the three small bones present in the middle ear. What is the biological term for them collectively ?
What is the name of passage in outer ear which carries sound waves to the ear-drum ?
The diagram alongside represents the structure found in the inner ear. Study the same and then answer the questions that follow:
(i) Name the parts labelled A, B, C and D.
(ii) Name the parts of the ear responsible for transmitting impulses to the brain.
(iii) Name the part labelled above which is responsible for:
1. Static equilibrium. 2. Dynamic equilibrium. 3. Hearing
(iv) Name the audio receptor cells which pick up vibrations.
(v) Name the fluid present in the inner ear.
Choose the Odd One Out:
The range of audible frequency for the human ear is
In the inner ear, the pressure variations are turned into electrical signals by the ______.
List the causes of noise pollution.
The eardrum is known as ______.
