An astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance [NEET 2016]
Text Solution
Verified by ExpertsThe correct answer is:
C
According to question,
Focal length of objective lens, 
Focal length of eyepiece lens 
Object distance for objective lens 
Applying lens formula for objective lens
Image will be form at first focus of eyepiece lens.
So, for normal adjustment distance between objectives and eye piece lense (length of tube) will be
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
For a concave mirror of focal length 20 cm, If the object is at a distance of 30 cm from the pole, …
Pick the wrong answer in the context with rainbow.
Which colour of the light has the longest wavelength?.
In total internal reflection when the angle ofincidence is equal to the critical angle for the pair…
Two similar thin equiconvex lenses, of focal length each, are kept coaxially in contact with each …
5. In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the …