Class 12 ISC Physics Optical Instrument Board Questions
Here we provide Class 12 Physics important notes,board questions and predicted questions with Answers for chapter Optical Instrument. These important notes,board questions and predicted questions are based on ISC board curriculum and correspond to the most recent Class 12 Physics syllabus. By practising these Class 12 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 12 Board examinations as well as other entrance exams such as NEET and JEE.
class 12 ISC Physics Optical Instrument BoardQuestions
Optical Instrument BoardQuestions
Q1
In an astronomical telescope of refracting type :
(a) objective should have small focal length.
(b) Objective should have large focal length.
(c) eyepiece should have large focal length.
(d) Both objective and eyepiece should have large focal length
solutions
(a) objective should have small focal length.
(b) Objective should have large focal length.
(c) eyepiece should have large focal length.
(d) Both objective and eyepiece should have large focal length
solutions
Q2
Convex lens of focal length 5 cm is used as a simple microscope. Where should an object be placed so
that the image formed by it lies at the least distance of distinct vision (D = 25 cm)?
solutions
solutions
Q3
Draw a labelled ray diagram of an image formed by a refracting telescope with final image formed at
Infinity. Derive an expression for its magnifying power with the final image at Infinity.
solutions
The required diagram for the formation of image by a refracting telescope is shown below:
solutions
The required diagram for the formation of image by a refracting telescope is shown below:
Q4
Draw a labelled ray diagram showing the formation of image by a refracting telescope when the final
image lies at Infinity.
solutions
The required diagram for the formation of image by a refracting telescope is shown below:
solutions
The required diagram for the formation of image by a refracting telescope is shown below:
Q7
A compound microscope consist of two convex lens of focal length 2 cm and 5 cm. When an object is
kept at distance of 2.1 cm from the objective of virtual and magnified image is formed 25 cm from
the eye piece. Calculate the magnifying power of the microscope.
solutions
solutions
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