Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Concepts Of Physics MCQ Edition [Volume 2]PhysicsHeat Transfer

A blackbody will never

Options

  1. Areflect radiation
  2. Bemit radiation
  3. Crefract radiation
  4. Dabsorb radiation

Correct answer

C. refract radiation

Step-by-step solution

A perfectly black body is defined as an ideal physical body that completely absorbs all electromagnetic radiation incident upon it, regardless of frequency or angle of incidence. Since it absorbs all incident radiation, its absorptance is 1 , while its reflectance and transmittance are both 0 . Because it does not reflect any radiation, it will never reflect radiation. Because it does not transmit any radiation through it, the phenomenon of refraction cannot occur. A blackbody does emit radiation (known as blackbod

Practice Heat Transfer on Quantrex Academy →

More from Heat Transfer

A liquid-nitrogen container is constructed from a 1 -cm thick styrofoam sheet with a thermal conductivity of 0.025 J s ⁻¹ m ⁻¹ ^ C ⁻¹ . Liquid nitrogen at 80 K is stored inside. A A uniform slab measuring 10 cm 10 cm 1 cm is placed between two heat reservoirs maintained at temperatures of 10^ C and 90^ C . The larger surface areas of the slab are in contact A person's normal body-temperature is 97 ^ F . Determine the rate at which heat flows out of their body through the clothes, assuming the following values: room temperature = 47 ^ A steel rod ( K = 46 J s ⁻¹ m ⁻¹ ^ C ⁻¹ ) of length 1.0 m has one end kept in ice at 0^ C and the opposite end in boiling water at 100^ C . The rod has a cross-sectional area of 0.An icebox almost entirely filled with ice at 0^ C is submerged in a large volume of water at 20^ C . The walls of the box have a surface area of 2400 cm ^2 , a thickness of 2.0 mm Water is boiled in a container whose bottom has a surface area of 25 cm ^2 , a thickness of 1.0 mm , and a thermal conductivity of 50 W m ⁻¹ ^ C ⁻¹ . After boiling begins, 100 g ofA pitcher having 1 -mm thick porous walls holds 10 kg of water. Water reaches the outer surface and evaporates at a rate of 0.1 g s ⁻¹ . The surface area of the pitcher (one side) Forming three sides of a square, a steel frame ( K = 45 W m ⁻¹ ^ C⁻¹ ) has a total length of 60 cm and a cross sectional area of 0.20 cm ^2 . The two free ends are maintained at 20 Full Heat Transfer list All Concepts Of Physics MCQ Edition [Volume 2] PYQs