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				| 1. | A nucleus A, with a finite de-Broglie wavelength λA, undergoes spontaneous fission into two nuclei B and C of equal mass. B flies in the same direction as that of A, while C files in the opposite direction with a velocity equal to half of that of B. The de-Broglie wavelengths λB and λC of B and C are respectively: | 
| A. | λA, 2λA | 
| B. | 2λA, λA | 
| C. | \({{\rm{\lambda }}_{{\rm{A'}}}}\frac{{{{\rm{\lambda }}_{\rm{A}}}}}{2}\) | 
| D. | \(\frac{{{{\rm{\lambda }}_{\rm{A}}}}}{2},{{\rm{\lambda }}_{\rm{A}}}\) | 
| Answer» E. | |