Question
What is the SI unit of measurement of refractive index of a medium?
- m
- m2
- m/s
- It is unitless
Hint:
The refractive index is a dimensionless number.
The correct answer is: It is unitless
The refractive index is unitless.
- SI unit is a system of internationally accepted units for measurement.
- The refractive index depends on the speed of light and the density of the medium.
- The refractive index is defined as the quotient of the speed of light as it passes through two media.
- Since it is a dimensionless number, it has no SI unit.
Related Questions to study
The refractive index of any medium is ____.
The refractive index of any medium is ____.
The refractive index of air is ____.
The refractive index of air is ____.
The speed of light in a vacuum is ______ m/s.
The speed of light in a vacuum is ______ m/s.
The radius of curvature of a convex mirror is taken to be _____.
the center of curvature and focus lies behind the convex mirror, hence the signs are taken as positive.
The radius of curvature of a convex mirror is taken to be _____.
the center of curvature and focus lies behind the convex mirror, hence the signs are taken as positive.
For an image formed behind a mirror towards the right, the sign for the image distance is _____.
For an image formed behind a mirror towards the right, the sign for the image distance is _____.
For an object standing in front of a spherical mirror, the object distance is _____.
For an object standing in front of a spherical mirror, the object distance is _____.
The height of a virtual and upright image is ____ as per the new cartesian sign convention.
The height of a virtual and upright image is ____ as per the new cartesian sign convention.
The height of a real and inverted image is _____ as per the new cartesian sign convention.
The height of a real and inverted image is _____ as per the new cartesian sign convention.
Before plugging in the values of various quantities in the expression to calculate the magnification it is important to _____.
Before plugging in the values of various quantities in the expression to calculate the magnification it is important to _____.
The magnification of the image of an object is found to be 1.25. Which of the following is true about it?
The magnification of the image of an object is found to be 1.25. Which of the following is true about it?
An object is placed at a distance of 20 cm from a convex mirror. Its image is formed at a distance of 10 cm from the mirror. The magnification is ____.
An object is placed at a distance of 20 cm from a convex mirror. Its image is formed at a distance of 10 cm from the mirror. The magnification is ____.
Which of the following should be taken as negative according to the new cartesian sign convention? (Note: the object is standing in front of a concave mirror.)
all the given cases show negative signs for a concave mirror.
Which of the following should be taken as negative according to the new cartesian sign convention? (Note: the object is standing in front of a concave mirror.)
all the given cases show negative signs for a concave mirror.
The height of a real and inverted image of an object of size 4 cm is 20 cm. The ratio of the image distance and the object distance is _____.
The height of a real and inverted image of an object of size 4 cm is 20 cm. The ratio of the image distance and the object distance is _____.
Which of the following should be taken as positive according to the new cartesian sign convention? (Note: the object is standing in front of the mirror along the +y direction.)
both the height of an object and the height of a virtual and upright image are positive.
Which of the following should be taken as positive according to the new cartesian sign convention? (Note: the object is standing in front of the mirror along the +y direction.)
both the height of an object and the height of a virtual and upright image are positive.
A real image is always _____.
the real image is always formed as inverted, therefore, for real image height is taken as negative.
A real image is always _____.
the real image is always formed as inverted, therefore, for real image height is taken as negative.