Heat and Thermal ExpansionHard

Question

Radiation from a black body at the thermodynamic temperature T1 is measured by a small detector at distance d1 from it. When the temperature is increased to T2 and the  distance to d2, the power received by the detector is unchanged. What is the ratio d2/d1 ? 

Options

A.
B.
C.
D.

Solution

Intensity in first case
I1 =
Intensity in second case
I2 =
Given I1 = I2 ⇒

Create a free account to view solution

View Solution Free
Topic: Heat and Thermal Expansion·Practice all Heat and Thermal Expansion questions

More Heat and Thermal Expansion Questions

n moles of an ideal triatomic linear gas undergoes a proses in which the temperature changes with volume as T = k1V2 whe...A point source of heat of power P is placed at the center of a spherical shell of mean radius R the material of the shel...An ice box made of styrofoam (thermal conductivity = 0.01 Jm-1 s-1 K-1) is used to keep liquids cool. It has a total wal...When water is boiled at 2 atm pressure, the letant heat of vaprization is 2. × 106 J/ kg and the boiling point is 1...A block body emits at the rate P when its temperature is T. At this temperature the wavelength at which the radiation ha...