Why do we see the flash of lightning before we hear the sound of thunder?
Why do we see the flash of lightning before we hear the sound of thunder?
हम मेघगर्जन की आवाज़ सुनने से पहले बिजली की चमक क्यों देखते हैं?
Detailed Solution & Logic
Sound travels slower than light/ प्रकाश, ध्वनि से धीमी गति से गमन करता है
Explanation
The speed of light is approximately $3 \times 10^8\ \text{m/s}$, which is extremely fast.
The speed of sound in air is approximately $343\ \text{m/s}$ at room temperature, which is much slower.
When lightning strikes, light reaches our eyes almost instantly, whereas the sound of thunder takes longer to reach our ears.
This is why we see the flash of lightning before hearing thunder.
Extra fact:
You can estimate the distance of a lightning strike by counting the seconds between seeing the flash and hearing thunder: every 3 seconds ≈ 1 km.
प्रकाश की गति लगभग $3 \times 10^8\ \text{m/s}$ है, जो बहुत तेज़ है।
ध्वनि की गति वायु में लगभग $343\ \text{m/s}$ है, जो काफी धीमी है।
जब बिजली चमकती है, तो प्रकाश हमारी आँखों तक तुरंत पहुँच जाता है, जबकि मेघगर्जन की आवाज़ हमारे कानों तक पहुँचने में समय लेती है।
इसलिए हम मेघगर्जन की आवाज़ सुनने से पहले बिजली की चमक देखते हैं।
अतिरिक्त तथ्य:
आप बिजली गिरने की दूरी का अनुमान लगा सकते हैं: चमक देखने और गर्जन सुनने के बीच सेकंड गिनें; हर 3 सेकंड ≈ 1 किमी।
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