Threshold wavelength or frequency from the work function

1. A.
   264
2. B.
   138
3. C.
   276
4. D.
   540

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1. A.
   $16 \times 10^{15}\text{ }Hz$
2. B.
   $16 \times 10^{12}\text{ }Hz$
3. C.
   $1.6 \times 10^{12}\text{ }Hz$
4. D.
   $1.6 \times 10^{15}\text{ }Hz$

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1. A.
   $215\text{ }nm$
2. B.
   $414\text{ }nm$
3. C.
   $400\text{ }nm$
4. D.
   $200\text{ }nm$

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1. A.
   Green
2. B.
   Blue
3. C.
   Red
4. D.
   Yellow

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1. A.
   $1.04 \times 10^{16}$
2. B.
   $1.04 \times 10^{13}$
3. C.
   $1.66 \times 10^{16}$
4. D.
   $1.66 \times 10^{15}$

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