'a' चौड़ाई वाली एक दरार को सफेद प्रकाश से
प्रकाशित किया जाता है। 'a' के किस मान के लिए
तरंगदैर्घ्य 650 nm के लाल प्रकाश हेतु प्रथम न्यूनतम
0 = 15° पर होगा ? (दिया है sin 15° = 0.2588)
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When hurricanes make landfall, they begin to decrease in strength because they no longer have the ocean water from which to gain energy. However, they are still dangerous and can cause much damage.
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