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Which type of telescope would require a longer tube length an astronomical telescope or a Galilean telescope?

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Important Questions on Human Eye and Optical Instruments

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A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm. If a 50 m tall tower at a distance of 1 km is observed through this telescope in a normal setting, the angle formed by the image of the tower is θ, then θ is close to
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With a neat labelled diagram explain the formation of image in a simple microscope.
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Physics>Optics>Human Eye and Optical Instruments>Optical Instruments
A 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:
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What is the magnifying power of a simple microscope of focal length 5 cm, if the image is formed at the distance of distinct vision?
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The magnifying power of a telescope with tube length 60cm is 5. What is the focal length of its eye piece?
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Physics>Optics>Human Eye and Optical Instruments>Optical Instruments
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is:
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In compound microscope, the focal length and aperture of the objective used is respectively
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If we need a magnification of 375 from a compound microscope of tube length 150mm and an objective of focal length 5mm, the focal length of the eye-piece, should be close to:
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In an astronomical telescope in normal adjustment a straight black line of the length L is drawn on inside part of objective lens. The eye-piece forms a real image of this line. The length of this image is l . The magnification of the telescope is:
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Physics>Optics>Human Eye and Optical Instruments>Optical Instruments

A compound microscope has an eyepiece of focal length 10 cm and an objective of focal length 4 cm. Calculate the magnification, if an object is kept at a distance of 5 cm from the objective, so that final image is formed at the least distance of distinct vision 20 cm.

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Astronomical telescopes are used for viewing distant stars and planets whereas _____ telescopes are used for viewing distant objects on earth.
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The image formed by an objective of a compound microscope is

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Two convex lenses of focal lengths 0.3 m and 0.05 m are used to make a telescope. The distance kept between the two in order to obtain an image at infinity is
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The image of a distant object as seen through an astronomical telescope is _____.
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The tube length of an astronomical telescope is _____ than that of a Galilean telescope.
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Anjali wants to look at the planet Jupiter in the sky. Which of the following instruments should she use to look at it?
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A _____ telescope is used to focus heavenly bodies.
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The final image in an astronomical telescope with respect to the object is virtual but that in Galilean telescope the image is _____
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A man with normal vision uses a magnifying lens of focal length 10 cm. Then

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In which optical instrument, the eyepiece is a concave lens?