Pick Out the Wrong Statement

question 58

Multiple Choice

Pick out the wrong statement:

• A)With change in temperature, the radiant energy emitted by a black body remains unchanged
• B)Absorptivity of a body approaches unity in case of diffuse reflection
• C)Absorptivity of a perfectly black body is unity
• D)Value of Stefan-Boltzmann constant is 4.876 × 10^-8 KCal/m² .hr.°K⁴

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Definitions:

Placental Stage

The third and final stage of childbirth where the placenta is delivered.

Trophoblast

The outer layer of a blastocyst, providing nutrients to the embryo and developing into a large part of the placenta.

Placenta

An organ that develops in the uterus during pregnancy to provide oxygen and nutrients to the growing baby, while removing waste products.

Primitive Streak

The primitive streak is a structure that forms on the surface of the early embryonic disc, marking the beginning of gastrulation and establishing body axes.