Chapter 19 – Optical Instruments
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The diameter of the moon is 3.5×10^3 km and its distance from the earth is 3.8×10^5 km. It is seen by a telescope having the focal length of the objective and the eye-piece as 4m and 10cm respectively. The diameter of the image of the moon will be approximately
15
Nov
The diameter of the moon is 3.5×10^3 km and its distance from the earth is 3.8×10^5 km. It is seen by a telescope having the focal length of the objective and the eye-piece as 4m and 10cm respectively. The diameter of the image of the moon will be approximately its magnifying power When the length [...]
A simple telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object in such a way that parallel rays emerge from the eye lens. If the object subtends an angle of 2^o at the objective, the angular width of the image is
15
Nov
A simple telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object in such a way that parallel rays emerge from the eye lens. If the object subtends an angle of 2^o at the objective, the angular width of [...]
A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm. Then,
15
Nov
A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm. Then, A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm. Then November 15, 2020 [...]
When the length of a microscope tube increases, its magnifying power
15
Nov
When the length of a microscope tube increases, its magnifying power its magnifying power When the length of a microscope tube increases November 15, 2020 Category: Cengage NEET by C.P Singh , Chapter 19 - Optical Instruments , Part 2 ,
Four convergent lenses have focal lengths 100 cm,10 cm,4 cm and 0.3 cm, for a telescope with maximum possible magnifications we choose the lenses of following focal lengths :
15
Nov
Four convergent lenses have focal lengths 100 cm,10 cm,4 cm and 0.3 cm, for a telescope with maximum possible magnifications we choose the lenses of following focal lengths : 10 cm ) 4 cm and 0.3 cm for a telescope with maximum possible magnifications we choose the lenses of following focal lengths : Four convergent [...]
An astronomical telescope has an angular magnification of magnitude 5 for an object. The separation between the objective and the eye-piece is 36 cm. The final image is formed at infinity. The focal length f0 of the objective and fe , of the eye-piece are :
15
Nov
An astronomical telescope has an angular magnification of magnitude 5 for an object. The separation between the objective and the eye-piece is 36 cm. The final image is formed at infinity. The focal length f0 of the objective and fe , of the eye-piece are : A simple magnifying lens is used in such a [...]
The focal length of the objective and the eye piece of a compound microscope are 2.0 cm and 3.0 cm, respectively. The distance between the objective and the eye piece is 15.0 cm. The final image formed by the eye piece is at infinity. The two lenses are thin. The distance in cm of the object and the image produced by the objective, measured from the objective lens, are respectively
15
Nov
The focal length of the objective and the eye piece of a compound microscope are 2.0 cm and 3.0 cm, respectively. The distance between the objective and the eye piece is 15.0 cm. The final image formed by the eye piece is at infinity. The two lenses are thin. The distance in cm of the [...]
A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm, which are separated by 15 cm. If the final image is formed at the least distance of distinct vision 25 cm, distance to the object from the objective is In previous question, the magnifying power of the microscope is
15
Nov
A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm, which are separated by 15 cm. If the final image is formed at the least distance of distinct vision 25 cm, distance to the object from the objective is In previous question, the magnifying power of [...]
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A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm ,
distance to the object from the objective is In previous question ,
the magnifying power of the microscope is ,
which are separated by 15 cm. If the final image is formed at the least distance of distinct vision 25 cm ,
A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm, which are separated by 15 cm. If the final image is formed at the least distance of distinct vision 25 cm, distance to the object from the objective is
15
Nov
A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm, which are separated by 15 cm. If the final image is formed at the least distance of distinct vision 25 cm, distance to the object from the objective is A compound microscope has an objective of [...]
A compound microscope has a magnification 30. The focal length of eyepiece is 5 cm. If the final image is formed at least distance of distinct vision (25 cm). Find the magnification produced by the objective is
15
Nov
A compound microscope has a magnification 30. The focal length of eyepiece is 5 cm. If the final image is formed at least distance of distinct vision (25 cm). Find the magnification produced by the objective is A simple magnifying lens is used in such a way that an image is formed at 25 cm [...]