A monochromatic ray of light strike the water `(n = 4//3)` surface in a cylindrical vessel at angle of incidence `53^@`. Depth of water is 36 cm. After striking the water surface, how long will the light take to reach the bottom of the vessel?[Angles of the most popular Pythagorean triangle of sidesin the ratio `3:4:5` are nearly `37^@`, `53^@` and `90^@`]

A ray of light travelling through air is incident on the surface of water in a lake . If the ray is inclined at 30^@ with the surface and if the refractive index of water is 4/3 then the angle through which the ray deviates is

A plane mirror PQ is help normally to water surface of refractive idex 1.33. A ray of light is incident at an angle of 50^@ with the nirror surface. After reflection the ray is refracted into water. The angle of refraction r is

A glass prism (mu = 1.5) is dipped in water (mu = 4//3) as shown in figure. A light ray is incident normally on the surface AB. It reaches the surface BC after total reflection, if

Volocity of light in diamond is (5/ 12)^(th) that in air. Velocity of light in water is (3/4)^(th) that in air. The angle of incidence of a ray of light taranvelling from water to diamond (r = 30^@) is

Velocity of light in deamond is (2/5)^(th) that in air. Velocity of light in water is (3/4)^(th) that in air. The angle of incidence of a ray of light travelling form water to diamond ( r = 30^@ ) is

The refractive index of water relative to air is 5/3. A ray of light passing from water into air is incident at the interface at an angle of 32^(@) with the normal. What angle does the refreacted ray make with the normal?

A glass slab of thickness 4 cm contains the same number of waves as X cm of water column when both are transverse by the same monochromatic light, If the refractive indices of glass and water ( for that light ) are 5/3 and 4/3 respectively, the value of X will be

Water rises to a height of 10 cm in a capillary tube and mercury falls to a depth of 3.42 cm in the same capillary tube. If the density of mercury is 13.6 g//c.c. and the angles of contact for mercury and for water are 135^@ and 0^@ , respectively, the ratio of surface tension for water and mercury is

Water is being poured into a vessel in the form of an inverted right circular cone of semi vertical angle 45^@ in such a way that the rate of change of volume at any moment is proportional to the area of the curved surfaces which is wet at that moment.Initially the vessel is full to a height od 2 cm,after 2 seconds the height becomes 10 cm.Show that after 3.5 seconds from the start,the height of water will be 16 cm.