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QJEEM21Ph3d9c: JEE Main 2021 Physics - Class 12 JEEM21Ph3d9c Solution: Given below are two statements : one is labeled as Assertion A…
Given below are two statements : one is labeled as Assertion A and the other is labeled as Reason R.
Assertion A : For a simple microscope, the angular size of the object equals the angular size of the image.
Reason R : Magnification is achieved as the small object can be kept much closer to the eye than 25 cm and hence it subtends a large angle.
In the light of the above statements, choose the most appropriate answer from the options given below :
Assertion A : For a simple microscope, the angular size of the object equals the angular size of the image.
Reason R : Magnification is achieved as the small object can be kept much closer to the eye than 25 cm and hence it subtends a large angle.
In the light of the above statements, choose the most appropriate answer from the options given below :
Multiple Choice Options
- A A is true but R is false
- B A is false but R is true
- C Both A and R are true and R is the correct explanation of A
- D Both A and R are true but R is NOT the correct explanation of A
Step-by-Step Verified Solution
The formation of image with simple microscope is shown below.
Here,
where, D = 25 cm (least distance of distinct vision)
Here, ' is same for both object and image, hence Assertion is true.
Magnification,
Hence, if u0 < D (25 cm), hence, the value of ' will obtain large.
So, option (c) is the correct.