Question

निम्नलिखित में किस माध्यम में प्रकाश की चाल सबसे अधिक होता है ?
(A) काँच
(B)
पानी
(D) निर्वात
(C) लोहा
In which of the following media is the speed of light maximu
(A) Glass
(B) Water
(C) Iron
(D) Vacuum​

Answer 1

vaccum. 300000 km/sec.

Answer 2

Speed of light is maximum in vacuum.

Step-by-step explanation:

Light speed  is maximum in vacuum. The speed of light in vacuum is around 300000 km s per second. The speed of light in vacuum is maximum because there is no obstractions in path of light traveled in vacuum. So light  travels at its maximum speed.

                                   Another reason for having speed of light maximum in vacuum is that the refractive index of vacuum is low i.e. equal to one. so speed of light is maximum in the vacuum.