Question
Before plugging in the values of various quantities in the expression to calculate the magnification it is important to _____.
- Convert them into CGS units
- Convert them into SI units
- Assign proper signs to the quantities as per the sign convention
- None of these
Hint:
Assign proper signs to the quantities as per the sign convention
The correct answer is: Assign proper signs to the quantities as per the sign convention
assigning proper signs to the quantities is very important before proceeding with any further calculations.
Related Questions to study
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.
An object of size 12 cm is placed in front of a concave mirror, it forms a real and inverted image of size 18 cm. What is the magnification of the image?
An object of size 12 cm is placed in front of a concave mirror, it forms a real and inverted image of size 18 cm. What is the magnification of the image?
The position of an object is always taken to be towards the ____ of the mirror.
object is always placed to the left of mirror.
The position of an object is always taken to be towards the ____ of the mirror.
object is always placed to the left of mirror.