Question

26. यदि किसी धातु का कार्य-फलन 2.8eV हो, तो देहली तरंगदैर्घ्य होगा
(A)400 nm
(B)500 nm
(C) 443.3nm
(D)334.4nm​

Answer 1

Work function = 2.8eV = 4.48 × 10^-19 J

Work function = hc/lambda

4.48×10^-19 = 6.626×10^-34×3×10^8 / lambda

lambda = 4.43 × 10^-7 m

lambda = 443.3 nm

please mark me if you are satisfied with my answer....

Answer 2

Answer:

look lollipop pop polio look loop pop pop pip