In beam theory, it is assumed that the planar cross-section of the beam remains planar and remains perpendicular to the axis of the beam as it bends. This implies that two material lines, the axis of the beam and a material line in the plane of the cross-section, remain perpendicular to each other. In view of this assumption, what is the transverse shear strain along the axis of the beam

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?