Advertisements
Advertisements
प्रश्न
Give scientific reasons: We cannot distinguish colours in moonlight.
Advertisements
उत्तर
Cone cells in the retina are responsibe for colour vision. They are functional only in bright light. Moon light is unable to stimulate the cone cells; however, the rod cells respond to dim light. Hence, we can see in moon light but cannot distinguish colours.
APPEARS IN
संबंधित प्रश्न
For human ears, the audible range is 20 Hz to 20,000 Hz.
Name the following:
The ear ossicle attached to the tympanum.
Differentiate between members of the following pair with reference to what is asked in bracket.
Semi-circular canal and cochlea (Senses perceived)
Differentiate between members of the following pair with reference to what is asked in bracket.
Dynamic balance and static balance (Definition)
Why should we not put a pin or pencil in our ears ?
Give the main function of the following:
Cochlea
The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?
Complete the following sentence with appropriate Word
The parts of the human ear concerned with hearing are :
Long answer question
Draw the neat labelled diagram of the human ear.
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.
