Which of the following statement is correct
Medium
Download our app for free and get started
(d) A good absorber is a good emitter hence option $(a)$ is wrong. Every body stops absorbing and emitting radiation at $0\,K$ hence option $(b)$ is wrong.
The energy of radiation emitted from a black body is not same for all wavelength hence option $(c)$ is wrong.
Plank’s law relates the wavelength ($\lambda$) and temperature $(T)$ according to the relation
${E_\lambda }{d_\lambda } = \frac{{8\pi \,hc}}{{{\lambda ^5}}}\frac{1}{{[{e^{hc/kT}} - 1]}}{d_\lambda }$. Hence option $(d)$ is correct.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1Assuming the Sun to be a spherical body of radius $R$ at a temperature of $T\ K$, evaluate the total radiant powerd incident of Earth at a distance $r$ from the SunView Solution
Where $r_{0}$ is the radius of the earth and $\sigma$ is Stefan's constant.
- 2View SolutionAccording to ‘Newton’s Law of cooling’, the rate of cooling of a body is proportional to the
- 3View SolutionIf the temperature of the sun becomes twice its present temperature, then
- 4Wein's constant is $2892 \times {10^{ - 6}}$$MKS$ unit and the value of ${\lambda _m}$ from moon is $14.46$ microns. What is the surface temperature of moon ...... $K$View Solution
- 5If temperature of sun is decreased by $1 \%$ then the value of solar constant will change by ........... $\%$View Solution
- 6A thin square steel plate with each side equal to $10$ cm is heated by a blacksmith. The rate of radiated energy by the heated plate is $1134 W$ . The temperature of the hot steel plate is ....... $K$ (Stefan's constant $\sigma = 5.67 \times {10^{ - 8}}watt\;{m^{ - 2}}{K^{ - 4}}$, emissivity of the plate = $1$ )View Solution
- 7View SolutionCan we boil water inside the earth satellite by convection
- 8The temperature of sun is $5500 K$ and it emits maximum intensity radiation in the yellow region $(5.5 \times {10^{ - 7}}m)$. The maximum radiation from a furnace occurs at wavelength $11 \times {10^{ - 7}}m.$The temperature of furnace is ....... $K$View Solution
- 9A liquid in a beaker has temperature $\theta (t)$ at time $t$ and $\theta_0$ is temperature of surroundings, then according to Newton's law of cooling the correct graph between loge $log_e(\theta - \theta_0) $ and $t$ isView Solution
- 10In an experment ot verify Newton's law of cooling, a graph is plotted between, the temperature difference $(\Delta T )$ of the water and surroundings and time as shown in figure. The initial temperature of water is taken as $80^{\circ} \,C$. The value of $t _{2}$ as mentioned in the graph will be...........View Solution
