defence exam Army Havildar SAC Mock Test Series 2025 Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect

1200 nm की दहलीज़ तरंगदैर्ध्य के साथ एक निश्चित धातु के लिए कार्य फलन कितना है?

1

1·82 eV

2

1·00 eV

3

1·24 eV

4

1·024 eV

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