Question

The number of incorrect statement/s about the black body from the following is _______
(A) Emit or absorb energy in the form of electromagnetic radiation 
(B) Frequency distribution of the emitted radiation depends on temperature
(C) At a given temperature, intensity vs frequency curve passes through a maximum value 
(D) The maximum of the intensity vs frequency curve is at a higher frequency at higher temperature compared to that at lower temperature

Hint:

The properties of black body radiation are governed by Planck’s law, Wien’s dis placement law, and Stefan-Boltzmann law. Remember, the peak frequency in creases with temperature, and the intensity curve always passes through a maximum.

Answer 1

Correct Answer: 0

Step 1: Evaluate Each Statement 

• (1): A black body emits or absorbs energy in the form of electromagnetic radiation. Correct—This is a fundamental principle of black body radiation.
• (2): The frequency distribution of the emitted radiation depends on temperature. Correct—Planck’s law explains this dependency.
• (3): At a given temperature, the intensity vs. frequency curve passes through a maximum value. Correct—This is a key observation of black body radiation.
• (4): The maximum of the intensity vs. frequency curve shifts to a higher frequency at higher temperatures. Correct—This is explained by Wien’s displacement law.

Step 2: Count the Incorrect Statements

All the given statements are correct.

Number of Incorrect Statements: 0

Conclusion:

Final Answer: The number of incorrect statements is 0.