Question
Explain spectral distribution of blackbody radiation.
✓
Answer
Blackbody radiation is the electromagnetic radiation emitted by a blackbody by virtue of its temperature. It extends over the whole range of wavelengths of electromagnetic waves. The distribution of energy over this entire range as a function of wavelength or frequency is known as the spectral distribution of blackbody radiation or blackbody radiation spectrum.If $R_\lambda$ is the emissive power of a blackbody in the wavelength range $\lambda$ and $\lambda+d \lambda$, the energy it emits per unit area per unit time in this wavelength range depends on its absolute temperature $T$, the wavelength $\lambda$ and the size of the interval $d \lambda$.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Three capacitors of capacities $8 \mu F , 8 \mu F$ and $4 \mu F$ are connected in series and a potential difference of $120 V$ is maintained across the combination. Calculate the charge on the capacitor of capacity $4 \mu F$. Also calculate the potential difference across it.
→Two coils of $100$ turns and $200$ turns have self inductances $25\ mH$ and $40\ mH$, respectively. Their mutual inductance is $3\ mH$. If a $6\ mA$ current in the first coil is changing at the rate of $4\ A / s$, calculate
→A set of $8$ tuning forks is arranged in a series of increasing order of frequencies. Each fork gives $4$ beats per second with the next one and the frequency of last for $k$ is twice that of the first. Calculate the frequencies of the first and the last for $k.$ [Ans:$28\ Hz, 56\ Hz$]
→Draw a neat labelled energy flow diagram of a heat engine.
The speed of water is $2 m / s$ through a pipe of internal diameter $10 cm$. What should be the internal diameter of nozzle of the pipe if the speed of water at nozzle is $4 m / s$ ?
→Observations from an experiment on photoelectric effect for the stopping potential by varying the incident frequency were plotted. The slope of the linear curve was found to be approximately $4.1 \times 10^{-15} V s$. Given that the charge of an electron is $1.6 \times 10^{-19} C$, find the value of the Planck's constant $h$.
→What is diffraction of light? How does it differ from interference? What are Fraunhoffer and Fresnel diffractions?
Whitelight consists of wavelengths from $400\ nm$ to $700\ nm.$ What will be the wavelength range seen when white light is passed through glass of refractive index $1.55?$
→Draw a neat labelled diagram of Ferry's perfectly black body. Compare the rms speed of hydrogen molecules at $227^{\circ} C$ with rms speed of oxygen molecule at $127^{\circ} C$. Given that molecular masses of hydrogen and oxygen are 2 and 32 respectively.
→Two organ pipes closed at one end have the same diameters but different lengths. Show that the end correction at each end is $e =\frac{n_1 l_1-n_2 l_2}{n_2-n_1}$, where the symbols have their usual meanings.
→