Why can we still hear a person talking even if he is behind a wall? Explain using the concept of diffraction.
دیوار کے پیچھے بولنے والے شخص کی آواز بھی کیوں سنائی دیتی ہے؟ انعراج کے تصور سے وضاحت کریں۔
Solution & explanation
Sound spreads around edges and through openings, especially when wavelengths are comparable to their size. Reflection and transmission may also contribute; the wave does not need to pass unchanged through a solid wall.
Independent study answer. Original textbook ↗ · English-medium printed page 44.