Tag: evs

Crampons or spiked attachments on mountaineering boots provide traction on ice and snow, preventing the climber from slipping.

Bachendri Pal became the first Indian woman to reach the summit of Mount Everest in 1984.

• Bachendri Pal became the first Indian woman to reach the summit of Mount Everest in 1984. 

For a plano-convex lens, spherical aberration is minimized when the curved surface faces the side with the smaller conjugate distance (the side with the more divergent rays). For a distant object, this means the curved surface should face the object.

In case of reflection an by a plane mirror, it does not give a real, inverted image and image never changes front into back.

No. of image $ = \dfrac{ 360^{\circ}}{ \theta} – 1$

                                             $ = 12-1$
                                             $ = 11$

The light is incident at 40 degrees to the vertical, so it makes an angle of 50 degrees with the horizontal. To reflect this light vertically downward, the mirror must bisect the angle between the incident ray and the vertical. The angle of the mirror to the horizontal is 70 degrees.

Moon does not have any light of its own, it reflects the light of the sun.

The tapetal layer is of great physiological significance as all the food material entering into the sporogenous tissue diffuses through this layer. Ultimately the cells of tapetal layer disorganise. Thus, tapetum makes a nutritive layer for the developing microspores or pollen grains.

Biological particles in the atmosphere often lack the necessary nutrients required to sustain metabolic activity or reproduction, limiting their survival time.