short sight
long sight
astigmatism
presbyopia
A. short sight
so that they may reflect thermal radiation from outside and minimise such radiation from them
so that they may absorb all radiation from outside
to make them attractive to look at
because they take high polish
the least scattered red colour reaching the eye
the dispersion of sun light occurred in air molecule in atmosphere
the diffraction of sunrays in atmospheric layers
interference of all the rays coming from the sun
Nebulae
Quasars
Meteors
Comets
less than
greater than
equal to
greater than or equal to
1000 km
1500 km
2000 km
500 km
there is more friction on ice than on concrete surface
ice is soft and spongy while concrete is hard
the friction between ice and the feet is less than that between the concrete and the feet
None of them
increases the melting point of ice
decreases the melting point of ice
has no effect on the melting point of ice
increases the volume of the ice
is real
is virtual
can be obtained on a screen
is slightly bigger than the object
Lens
Iris
Retina
Eyelid
to make it smooth and frictionless
to make it rust - proof
to reduce heat loss by radiation
to make it more durable
virtual and upright
virtual and inverted
real and inverted
real and upright
ultraviolet rays
gamma rays
radio waves
infrared waves
mercury thermometers
alcohol thermometers
platinum resistance thermometers
thermoelectric thermometers
increases
decreases
remains the same
first increases then decreases
kinetic energy
potential energy
momentum
both potential and kinetic energy
nichrome
tungsten
copper
aluminium
poor reflection from the mirrors
scattering of light from the mirrors
absorption of some light by the mirrors
absorption of light by the atmosphere
Voltaic cell
Leclanche cell
Dry cell
An accumulator
collision between molecules of filled gas under electric current
heavy current
vacuum inside the tube
falling of ultra violet rays on the white inner coating of the tube
potential difference
resistance
current
All the above
velocity of sound
velocity of light
a constant factor
wavelength of light
Thumba
Bangalore
Ahmedabad
New Delhi
short sight
long sight
astigmatism
presbyopia
on the outer surface
in the inner surface
at the centre of the ring
None of the above
Mars
Venus
Earth
Mercury
�± -rays
�² -rays
�³ -rays
X-rays
a quantum of electromagnetic radiation
light source used in photography
a photo film
sun-light
Fusion converts nuclear energy into heat
Fusion demands conditions of extremely high temperature to produce it
Fusion produces large amount of heat
Fusion reactions takes place in the sun
Microphone converts sound energy into electrical energy.
Electric fan converts electrical energy into mechanical energy.
Battery converts chemical energy into electrical energy.
All the above
Sound energy from his mouth is then directed in one direction
The cupped hand acts as a cardboard tube of short length
The pitch of sound increases
Both (a) and (b)