science
Grade-7
Easy
Question
The refractive index of glass, given the speed of light in the glass, is 2 x 108 m/s is ___.
- 1
- 1.5
- 1.33
- 0
Hint:
Use formula of refractive index.
The correct answer is: 1.5
The correct answer is b) 1.5.
Refractive index is the ratio of speed of light in vacuum and speed of light in medium.
Here the speed of light in glass is given as 2 x 108 m/s.
Speed of light in vacuum=3x108 m/s.
Now, Refractive index = 3x108 /2 x 108
=1.5
Related Questions to study
science
A ray of light is incident on a water-air interface at an angle of 37 degrees. The angle of refraction will be ___ degrees.
A ray of light is incident on a water-air interface at an angle of 37 degrees. The angle of refraction will be ___ degrees.
scienceGrade-7
science
Which of the following cannot be a value of the refractive index of a material?
Which of the following cannot be a value of the refractive index of a material?
scienceGrade-7
science
What decides the amount of bending of light towards or away from the normal?
What decides the amount of bending of light towards or away from the normal?
scienceGrade-7
science
Which of the following has the minimum value of refractive index?
Which of the following has the minimum value of refractive index?
scienceGrade-7
science
During normal incidence, the angle of incidence ___ the angle of refraction.
During normal incidence, the angle of incidence ___ the angle of refraction.
scienceGrade-7
science
The refractive indices of water___ glass ___ air.
The refractive indices of water___ glass ___ air.
scienceGrade-7
science
During normal incidence, the light ray goes ___.
During normal incidence, the light ray goes ___.
scienceGrade-7
science
During normal incidence on a glass slab, the angle of incidence = ____.
During normal incidence on a glass slab, the angle of incidence = ____.
scienceGrade-7
science
The absolute refractive index of a medium is the ratio of the speed of light in the ____ and ____.
The absolute refractive index of a medium is the ratio of the speed of light in the ____ and ____.
scienceGrade-7
science
The minimum value of the refractive index is ___.
The minimum value of the refractive index is ___.
scienceGrade-7
science
A ray of light is incident on an air-glass interface at an angle of 48 degrees and finally comes out from glass to air, after refraction through glass slab, the angle of emergence will be ___ degrees.
A ray of light is incident on an air-glass interface at an angle of 48 degrees and finally comes out from glass to air, after refraction through glass slab, the angle of emergence will be ___ degrees.
scienceGrade-7
science
During normal incidence, the angle of incidence is equal to the angle of refraction = ___ degrees.
During normal incidence, the angle of incidence is equal to the angle of refraction = ___ degrees.
scienceGrade-7
science
During refraction through a glass slab, the incident ray is not parallel to ____.
During refraction through a glass slab, the incident ray is not parallel to ____.
scienceGrade-7
science
The unit of the refractive index is ___.
The unit of the refractive index is ___.
scienceGrade-7
science
The speed of light is ___ x 108 m/s.
The speed of light is ___ x 108 m/s.
scienceGrade-7
