Preethi's CBSE Class 10 Physics - Light
Refraction of light - answer When traveling obliquely from one medium to another, the
direction of propagation of light in the second medium changes. This phenomenon is
known as refraction of light
When the light ray passes through a rarer medium to a denser medium - answer The
light ray bends towards the normal
When a light ray passes from a denser medium to a rarer medium - answer It bends
away from the normal
The emergent ray is - answer Parallel to the direction of the incident ray
Refraction is due to the - answerChange in the speed of light as it enters from one
transparent medium to another
First law of refraction of light - answerThe incident ray, refracted ray and normal to the
interface of the two transparent media at the point of incidence all lie in the same plane
Second law of refraction aka - answerSnell's Law
Snell's law - answerThe ratio of sine of angle of incidence to sine of angle of refraction
is a constant for the light of a given color and for the given pair of media
Light speed in air - answer3* 10 power 8 m/s
A ray parallel to the principal axis - answerWill pass through the focus after reflection
A ray passing through the principal focus - answerWill be parallel to the principal axis
after reflection
A ray passing through the center of curvature - answerWill be reflected back along the
same path
R = - answer2f
Radius of curvature is - answerThe radius of the sphere of which the reflecting surface
of the spherical mirror forms a part
Principal axis - answerIs A straight line passing through the pole and centre of curvature
of a spherical mirror
Refraction of light - answer When traveling obliquely from one medium to another, the
direction of propagation of light in the second medium changes. This phenomenon is
known as refraction of light
When the light ray passes through a rarer medium to a denser medium - answer The
light ray bends towards the normal
When a light ray passes from a denser medium to a rarer medium - answer It bends
away from the normal
The emergent ray is - answer Parallel to the direction of the incident ray
Refraction is due to the - answerChange in the speed of light as it enters from one
transparent medium to another
First law of refraction of light - answerThe incident ray, refracted ray and normal to the
interface of the two transparent media at the point of incidence all lie in the same plane
Second law of refraction aka - answerSnell's Law
Snell's law - answerThe ratio of sine of angle of incidence to sine of angle of refraction
is a constant for the light of a given color and for the given pair of media
Light speed in air - answer3* 10 power 8 m/s
A ray parallel to the principal axis - answerWill pass through the focus after reflection
A ray passing through the principal focus - answerWill be parallel to the principal axis
after reflection
A ray passing through the center of curvature - answerWill be reflected back along the
same path
R = - answer2f
Radius of curvature is - answerThe radius of the sphere of which the reflecting surface
of the spherical mirror forms a part
Principal axis - answerIs A straight line passing through the pole and centre of curvature
of a spherical mirror
