Total internal reflection is possible when light travels from
air to water
air to glass
water to glass
glass to water
D.
glass to water
When light travels from denser medium glass to rarer medium (water) it bends away from the normal. Therefore the angle of refraction is greater than the angle of incidence. For a particular angle of incidence which is greater than the critical angle, light scatters internal reflection i. e. returns in the denser medium (glass).
The potential difference across a conductor of resistivity e is constant. The heat generated in the conductor is directly proportional to
e
e2
A body of mass 2 kg is moving on a smooth horizontal surface with an initial velocity of 10 ms-1 along the east. A uniform force of 10 N towards the north is applied to the body. The final velocity of the body after 2 s will be
ms-1 at 45° North of East
ms-1 at 45° South of East
20 ms-1 towards East
20 ms-1 towards West
Which of the following gives precipitate, with ammoniacal silver nitrate solution?
C2H6 (Ethane)
C2H4 (Ethylene)
C2H2 (Acetylene)
C3H6 (Propene)