Miscellaneous Problems on Ray Optics and Optical Instruments
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PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364538 There are four convex lens \({L_1},{L_2},{L_3},{L_4}\) of focal lengths 2, 4, 6 and 8cm respectively. Two of these lenses from a telescope of length 10cm and magnifying power 4. The objective and eye lenses are respectively

1 \({L_1},{L_2}\)
2 \({L_1},{L_4}\)
3 \({L_2},{L_3}\)
4 \({L_4},{L_1}\)
MHTCET - 2020
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364539 The magnifying power of telescope is high, if

1 both objective and eyepiece have short focal length
2 both objective and eyepiece have large focal length
3 the objective has a large focal length and the eyepiece has a short focal length
4 the objective has a short focal length and the eyepiece has a large focal length.
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364540 The focal length of objective and eye lens of astronomical telescope are respectively \(2\,m\) and \(5\,cm\). Final image is formed at (1) least distance of distinct vision (2) infinity. The magnifying power in both cases will be:

1 \({-48,-40}\)
2 \({-40,-48}\)
3 \({-40,48}\)
4 \({-48,40}\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364541 A telescope has focal length of objective and eyepiece as \(200\;cm\) and \(5\;cm,\) respectively. What is magnification of telescope?

1 40
2 80
3 50
4 0.01
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364542 If tube length of astronomical telescope is \(105{\rm{ }}cm\) and magnifying power is 20 for normal setting, calculate the focal length of objective

1 \(25\;cm\)
2 \(100\;cm\)
3 \(10\;cm\)
4 \(20\;cm\)
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PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364538 There are four convex lens \({L_1},{L_2},{L_3},{L_4}\) of focal lengths 2, 4, 6 and 8cm respectively. Two of these lenses from a telescope of length 10cm and magnifying power 4. The objective and eye lenses are respectively

1 \({L_1},{L_2}\)
2 \({L_1},{L_4}\)
3 \({L_2},{L_3}\)
4 \({L_4},{L_1}\)
MHTCET - 2020
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364539 The magnifying power of telescope is high, if

1 both objective and eyepiece have short focal length
2 both objective and eyepiece have large focal length
3 the objective has a large focal length and the eyepiece has a short focal length
4 the objective has a short focal length and the eyepiece has a large focal length.
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364540 The focal length of objective and eye lens of astronomical telescope are respectively \(2\,m\) and \(5\,cm\). Final image is formed at (1) least distance of distinct vision (2) infinity. The magnifying power in both cases will be:

1 \({-48,-40}\)
2 \({-40,-48}\)
3 \({-40,48}\)
4 \({-48,40}\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364541 A telescope has focal length of objective and eyepiece as \(200\;cm\) and \(5\;cm,\) respectively. What is magnification of telescope?

1 40
2 80
3 50
4 0.01
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364542 If tube length of astronomical telescope is \(105{\rm{ }}cm\) and magnifying power is 20 for normal setting, calculate the focal length of objective

1 \(25\;cm\)
2 \(100\;cm\)
3 \(10\;cm\)
4 \(20\;cm\)
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PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364538 There are four convex lens \({L_1},{L_2},{L_3},{L_4}\) of focal lengths 2, 4, 6 and 8cm respectively. Two of these lenses from a telescope of length 10cm and magnifying power 4. The objective and eye lenses are respectively

1 \({L_1},{L_2}\)
2 \({L_1},{L_4}\)
3 \({L_2},{L_3}\)
4 \({L_4},{L_1}\)
MHTCET - 2020
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364539 The magnifying power of telescope is high, if

1 both objective and eyepiece have short focal length
2 both objective and eyepiece have large focal length
3 the objective has a large focal length and the eyepiece has a short focal length
4 the objective has a short focal length and the eyepiece has a large focal length.
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364540 The focal length of objective and eye lens of astronomical telescope are respectively \(2\,m\) and \(5\,cm\). Final image is formed at (1) least distance of distinct vision (2) infinity. The magnifying power in both cases will be:

1 \({-48,-40}\)
2 \({-40,-48}\)
3 \({-40,48}\)
4 \({-48,40}\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364541 A telescope has focal length of objective and eyepiece as \(200\;cm\) and \(5\;cm,\) respectively. What is magnification of telescope?

1 40
2 80
3 50
4 0.01
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364542 If tube length of astronomical telescope is \(105{\rm{ }}cm\) and magnifying power is 20 for normal setting, calculate the focal length of objective

1 \(25\;cm\)
2 \(100\;cm\)
3 \(10\;cm\)
4 \(20\;cm\)
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PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364538 There are four convex lens \({L_1},{L_2},{L_3},{L_4}\) of focal lengths 2, 4, 6 and 8cm respectively. Two of these lenses from a telescope of length 10cm and magnifying power 4. The objective and eye lenses are respectively

1 \({L_1},{L_2}\)
2 \({L_1},{L_4}\)
3 \({L_2},{L_3}\)
4 \({L_4},{L_1}\)
MHTCET - 2020
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364539 The magnifying power of telescope is high, if

1 both objective and eyepiece have short focal length
2 both objective and eyepiece have large focal length
3 the objective has a large focal length and the eyepiece has a short focal length
4 the objective has a short focal length and the eyepiece has a large focal length.
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364540 The focal length of objective and eye lens of astronomical telescope are respectively \(2\,m\) and \(5\,cm\). Final image is formed at (1) least distance of distinct vision (2) infinity. The magnifying power in both cases will be:

1 \({-48,-40}\)
2 \({-40,-48}\)
3 \({-40,48}\)
4 \({-48,40}\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364541 A telescope has focal length of objective and eyepiece as \(200\;cm\) and \(5\;cm,\) respectively. What is magnification of telescope?

1 40
2 80
3 50
4 0.01
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364542 If tube length of astronomical telescope is \(105{\rm{ }}cm\) and magnifying power is 20 for normal setting, calculate the focal length of objective

1 \(25\;cm\)
2 \(100\;cm\)
3 \(10\;cm\)
4 \(20\;cm\)
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PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364538 There are four convex lens \({L_1},{L_2},{L_3},{L_4}\) of focal lengths 2, 4, 6 and 8cm respectively. Two of these lenses from a telescope of length 10cm and magnifying power 4. The objective and eye lenses are respectively

1 \({L_1},{L_2}\)
2 \({L_1},{L_4}\)
3 \({L_2},{L_3}\)
4 \({L_4},{L_1}\)
MHTCET - 2020
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364539 The magnifying power of telescope is high, if

1 both objective and eyepiece have short focal length
2 both objective and eyepiece have large focal length
3 the objective has a large focal length and the eyepiece has a short focal length
4 the objective has a short focal length and the eyepiece has a large focal length.
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364540 The focal length of objective and eye lens of astronomical telescope are respectively \(2\,m\) and \(5\,cm\). Final image is formed at (1) least distance of distinct vision (2) infinity. The magnifying power in both cases will be:

1 \({-48,-40}\)
2 \({-40,-48}\)
3 \({-40,48}\)
4 \({-48,40}\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364541 A telescope has focal length of objective and eyepiece as \(200\;cm\) and \(5\;cm,\) respectively. What is magnification of telescope?

1 40
2 80
3 50
4 0.01
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS

364542 If tube length of astronomical telescope is \(105{\rm{ }}cm\) and magnifying power is 20 for normal setting, calculate the focal length of objective

1 \(25\;cm\)
2 \(100\;cm\)
3 \(10\;cm\)
4 \(20\;cm\)