The sun emits a light with maximum wavelength $510\, mm$ while another star $X$ emits a light with maximum wavelength of $350\, nm$. What is the ratio of surface temperature of sun and the star $X$
AIIMS 2000, Medium
Download our app for free and get started
(b)As $\lambda \propto \frac{1}{T};$ so $\frac{{{T_1}}}{{{T_2}}} = \frac{{{\lambda _2}}}{{{\lambda _1}}} = \frac{{350}}{{510}} = 0.68$
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
- 1A spherical black body with a radius of $24\;cm$ radiates $440\;W$ power at $500\;K$. If the radius were halved and the temperature doubled, the power radiated in watt would beView Solution
- 2View SolutionThe spectral energy distribution of star is maximum at twice temperature as that of sun. The total energy radiated by star is
- 3View SolutionThe wavelength of radiation emitted by a body depends upon
- 4View SolutionPick out the statement which is not true
- 5A metal ball of surface area $200\;c{m^2}$ and temperature ${527^o}C$ is surrounded by a vessel at ${27^o}C$. If the emissivity of the metal is $0.4$ , then the rate of loss of heat from the ball is .......... $joules $ approx. $(\sigma = 5.67 \times {10^{ - 8}}J/{m^2}\; - s - {k^4})$View Solution
- 6Two rods $A$ and $B$ of different materials are welded together as shown in figure.Their thermal conductivities are $K_1$ and $K_2$ The thermal conductivity of the composite rod will beView Solution
- 7View SolutionIn rainy season, on a clear night the black seat of a bicycle becomes wet because
- 8View SolutionHalf part of ice block is covered with black cloth and rest half is covered with white cloth and then it is kept in sunlight. After some time clothes are removed to see the melted ice. Which of the following statements is correct
- 9Suppose the sun expands so that its radius becomes $100$ times its present radius and its surface temperature becomes half of its present value. The total energy emitted by it then will increase by a factor ofView Solution
- 10Three rods of equal length and cross sectional area and coefficient of thermal conductivities $K, 2K$ and $3K$ are joined as shown in figure temperature of their ends are $110\ ^oC, 20\ ^oC$ and $0\ ^oC$ respectively then temperature of junction will be ......... $^oC$View Solution
