JEE Advanced 2023 Physics question
Match the temperature of a black body given in List-I with an appropriate statement in List-II, and choose the correct option. [Given: Wien's constant as m-K and V-m] List-I (P) 2000 K (Q) 3000 K (R) 5000 K (S) 10000 K List-II (1) The radiation at peak wavelength can lead to emission of photoelectrons from a metal of work function 4 eV. (2) The radiation at peak wavelength is visible to human eye. (3) The radiation at peak emission wavelength will result in the widest central maximum of a single slit diffraction. (4) The power emitted per unit area is 1/16 of that emitted by a blackbody at temperature 6000 K. (5) The radiation at peak emission wavelength can be used to image human bones.
Solution
Peak wavelengths : 2000 K → 1450 nm, 3000 K → 967 nm, 5000 K → 580 nm, 10000 K → 290 nm. (P) The longest wavelength gives the widest central maximum (width ) → (3). (Q)
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