Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Thermal Properties of Matter

NTA Abhyas 2020 · Physics · Thermal Properties of Matter

A black body, at 200K , is found to have maximum energy at a...

A black body, at 200K200K, is found to have maximum energy at a wavelength of 14μm14\mu m. When its temperature is raised to 1000K1000K, the wavelength at which maximum energy is emitted is

Options

  1. A14μm14\mu m
  2. B70μm70\mu m
  3. C2.8μm2.8\mu m
  4. D2.82.8 mm

Correct answer

C. 2.8μm2.8\mu m

Step-by-step solution

λm1T1=λm2T2⇒λm2=λm1T1T2=14×2001000=2.8μm{λ}_{m1}{T}_{1} = {λ}_{m2}{T}_{2} ⇒ {λ}_{m2} = \dfrac{{λ}_{m1}{T}_{1}}{T2} = \dfrac{14 \times 200}{1000} = 2.8\mu m
Practice Thermal Properties of Matter on Quantrex Academy →

More from Thermal Properties of Matter

As shown in the figure, an insulated container is fitted with a thermally conducting but… JEE Advanced 2026The heat extracted out of x gram of water initially at 50°C to cool it down to 0°C is… JEE Main 2026The temperature of a metal strip having coefficient of linear expansion α is increased… JEE Main 2026Which of the following best represents the temperature versus heat supplied graph for… JEE Main 202610 kg of ice at -10^ ∘ C is added to 100 kg of water to lower its temperature from 25 ^ ∘… JEE Main 2026A brass wire of length 2 m and radius 1 mm at 27^ ∘ C is held taut between two rigid… JEE Main 2026Rods x and y of equal dimensions but of different materials are joined as shown in… JEE Main 2026An aluminium and steel rods having same lengths and cross-sections are joined to make… JEE Main 2026 Full Thermal Properties of Matter list All NTA Abhyas JEE Main PYQs