Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface

4000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\], 7500 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]

5500 \[\overset{\text{o}}{\mathop{\text{A}}}\,\], 6000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]

4000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\], 6000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]

Work function of a metal is 2.1 eV. Which of the waves of the followin

1.	Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface
A.	4000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\], 7500 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
B.	5500 \[\overset{\text{o}}{\mathop{\text{A}}}\,\], 6000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
C.	4000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\], 6000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
D.	None of these
Answer» E.