Variation of radiant energy emitted by sun, filament of tungsten lamp and welding arc as a function of its wavelength is shown in figure. Which of the following option is the correct match?
Variation of radiant energy emitted by sun, filament of tungsten lamp and welding arc as a function of its wavelength is shown in figure. Which of the following option is the correct match?
- A
Sun$-T_1$ , tungsten filament $-T_2$ , welding arc $-T_3$
- B
Sun$-T_2$ , tungsten filament $-T_1$ , welding arc $-T_3$
- C
Sun$-T_3$ , tungsten filament $-T_1$ , welding arc $-T_2$
- D
Sun$-T_1$ , tungsten filament $-T_3$ , welding arc $-T_2$
Similar Questions
The filament of a light bulb has surface area $64 mm ^2$. The filament can be considered as a black body at temperature $2500 K$ emitting radiation like a point source when viewed from far. At night the light bulb is observed from a distance of $100 m$. Assume the pupil of the eyes of the observer to be circular with radius $3 mm$. Then
(Take Stefan-Boltzmann constant $=5.67 \times 10^{-8} Wm ^{-2} K ^{-4}$, Wien's displacement constant $=2.90 \times 10^{-3} m - K$, Planck's constant $=6.63 \times 10^{-34} Js$, speed of light in vacuum $=3.00 \times 10^8 ms ^{-1}$ )-
$(A)$ power radiated by the filament is in the range $642 W$ to $645 W$
$(B)$ radiated power entering into one eye of the observer is in the range $3.15 \times 10^{-8} W$ to $3.25 \times 10^{-8} W$
$(C)$ the wavelength corresponding to the maximum intensity of light is $1160 nm$
$(D)$ taking the average wavelength of emitted radiation to be $1740 nm$, the total number of photons entering per second into one eye of the observer is in the range $2.75 \times 10^{11}$ to $2.85 \times 10^{11}$
The filament of a light bulb has surface area $64 mm ^2$. The filament can be considered as a black body at temperature $2500 K$ emitting radiation like a point source when viewed from far. At night the light bulb is observed from a distance of $100 m$. Assume the pupil of the eyes of the observer to be circular with radius $3 mm$. Then
(Take Stefan-Boltzmann constant $=5.67 \times 10^{-8} Wm ^{-2} K ^{-4}$, Wien's displacement constant $=2.90 \times 10^{-3} m - K$, Planck's constant $=6.63 \times 10^{-34} Js$, speed of light in vacuum $=3.00 \times 10^8 ms ^{-1}$ )-
$(A)$ power radiated by the filament is in the range $642 W$ to $645 W$
$(B)$ radiated power entering into one eye of the observer is in the range $3.15 \times 10^{-8} W$ to $3.25 \times 10^{-8} W$
$(C)$ the wavelength corresponding to the maximum intensity of light is $1160 nm$
$(D)$ taking the average wavelength of emitted radiation to be $1740 nm$, the total number of photons entering per second into one eye of the observer is in the range $2.75 \times 10^{11}$ to $2.85 \times 10^{11}$
- [IIT 2020]
On increasing the temperature of a substance gradually, which of the following colours will be noticed by you
On increasing the temperature of a substance gradually, which of the following colours will be noticed by you
Which of the following is the $\nu_m = T$ graph for a perfectly black body ($\nu_m$ =maximum frequency of radiation)
Which of the following is the $\nu_m = T$ graph for a perfectly black body ($\nu_m$ =maximum frequency of radiation)
The absolute temperatures of two black bodies are $2000 K$ and $3000 K$ respectively. The ratio of wavelengths corresponding to maximum emission of radiation by them will be
The absolute temperatures of two black bodies are $2000 K$ and $3000 K$ respectively. The ratio of wavelengths corresponding to maximum emission of radiation by them will be
A black body is at a temperature of $5760\ K$. The energy of radiation emitted by the body at wavelength $250\ nm$ is $U_1$, at wavelength $500\ nm$ is $U_2$ and that at $1000\ nm$ is $U_3$. Wien's constant, $b = 2.88 \times 10^6\ nm\ K$. Which of the following is correct?
A black body is at a temperature of $5760\ K$. The energy of radiation emitted by the body at wavelength $250\ nm$ is $U_1$, at wavelength $500\ nm$ is $U_2$ and that at $1000\ nm$ is $U_3$. Wien's constant, $b = 2.88 \times 10^6\ nm\ K$. Which of the following is correct?
- [NEET 2016]