LIGHT NUMERICALS
TEST
TOTA L MA KS- 50
Q1 )A ray of light enters a rectangular glass slab of
refractive index 1.5. It is found that the ray emerges
from the opposite face of the slab without being
displaced. If its speed in air is 3 × 108 m/s then
what is its speed in glass? 3 ( MARKS)
Q2) The speed of light in a transparent medium is
0.6 times that of its speed in vacuum. What is
the refractive index of the medium? 3
( MARKS)
Q3) Define the focus of a concave mirror. If the
radius of curvature of a convex mirror is 30 cm, what
would be its focal length? 3
( MARKS)
Q4) “The refractive index of diamond is 2 4. 2”.What
is the meaning of this statement in relation to speed
of light? 3
( MARKS)
Q5) The refractive index of water is 1.33 and the
speed of light in air is 3 × 108 m/s. Calculate the
speed of light in water. 3 ( MARKS)
TEST
TOTA L MA KS- 50
Q1 )A ray of light enters a rectangular glass slab of
refractive index 1.5. It is found that the ray emerges
from the opposite face of the slab without being
displaced. If its speed in air is 3 × 108 m/s then
what is its speed in glass? 3 ( MARKS)
Q2) The speed of light in a transparent medium is
0.6 times that of its speed in vacuum. What is
the refractive index of the medium? 3
( MARKS)
Q3) Define the focus of a concave mirror. If the
radius of curvature of a convex mirror is 30 cm, what
would be its focal length? 3
( MARKS)
Q4) “The refractive index of diamond is 2 4. 2”.What
is the meaning of this statement in relation to speed
of light? 3
( MARKS)
Q5) The refractive index of water is 1.33 and the
speed of light in air is 3 × 108 m/s. Calculate the
speed of light in water. 3 ( MARKS)
