Class 10 Physics21)
Magnification produced by a rear view mirror fitted in vehicles
is less than one
Convex mirror is used as rear view mirror and alway forms virtual, erect and diminished inage. So magnification produced by a rear view mirror is less than one.
Class 10 Physics22)
A full length image of a distant tall building can definitely be seen by using
a convex mirror
Convex mirror has a wide field of view as it forms virtual, erect and diminished image. Hence, fall length of image of distance tall building can definitely be seen by using it.
Class 10 Physics23)
The laws of reflection hold good for
all mirrors irrespective of their shape
The laws of reflection hold good for light reflected from any smooth surface irrespective of their shapes.
Class 10 Physics24)
When light falls on a smooth polished surface, most of it
is reflected in the same direction
Class 10 Physics25)
Focal length of a concave mirror is
Class 10 Physics26)
If the power of a lens is – 2 D, what is its focal length?
Class 10 Physics27)
The air layer of atmosphere whose temperature is less then the hot layer behave as optically
The cold air layer of the atmosphere acts as a optically denser medium than hot air because the molecules are closely packed together.
Class 10 Physics28)
Refraction of light by the earth’s atmosphere due to variation in air density is called
This phenomena is called atmospheric refraction.
Class 10 Physics29)
The deflection of light by minute particles and molecules of the atmosphere in all direction is called ____________ of light.
The said phenomenon is called scattering of light.
Class 10 Physics30)
One cannot see through the fog, because
light is scattered by the droplets
Objects are not visible through the fog because droplets scatter the light rays.