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प्रश्न
Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?
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उत्तर
We know that the speed of sound is 330 m/s, while the speed of light is 300,000,000 m/s. Thus, we can say that the speed of light will be greater than that of sound. That is, light travels faster than sound. This is why when there is thunder and lightning, the lightning is seen first, and the thunder is heard later.
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संबंधित प्रश्न
Photoreceptor cells are present in __________.
(A) blind spot
(B) retina
(C) cochlea
(D) cornea
Deafness is causal due to the rupturing of the Pinna.
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.
State the main function of the Eustachian tube
Give technical terms for The nerve which transmits impulses from the ear to the brain
Sclerotic layer or choroid layer.(Which one forms the Iris ?)
Differentiate between members of the following pair with reference to what is asked in bracket.
Semi-circular canal and cochlea (Senses perceived)
Choose the correct answer.
Labyrinth is a part of ____________
Mention, if the following statement is True or False
Deafness is caused due to the rupturing of the pinna.
The spiral organ possessing sensory cells for hearing is ______.
