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Ray Optics

282900 Which of the following produces virtual image?

1 Simple microscope

2 Ordinary camera

3 Projector

4 Cinemascope

AIIMS-26.05.2018(M)

Ray Optics

282901 In a simple microscope of focal length $5 cm$ , final image is formed at $D (D = 25 cm)$ , then its magnification will be :

1 6

2 5

3 2

4 1

Explanation:

A: Given that,
$f = 5 cm, D = 25 cm$
Magnification, $m = 1 + \frac{D}{f}$
$\begin{array}{r} m = 1 + \frac{25}{5} \\ m = 6 \end{array}$

AIIMS-26.05.2018(M)

Ray Optics

282902 A microscope has an objective of aperture 8 $mm$ and focal length of $5 cm$ . The minimum separation between two objects to be just resolved by the microscope is (wavelength of light used = $5500 \AA$ )

1

2.2 μ m

2

3.4 μ m

3

4.2 μ m

4

3.6 μ m

Explanation:

C: Given, focal length, $f = 5 cm$
Wavelength, $λ = 5500 \AA$
Diameter, $D = 8 mm$
$\begin{aligned} d_{min} = \frac{1.22 f λ}{D} & = \frac{1.22 \times 5 \times 10^{- 2} \times 5500 \times 10^{- 10}}{8 \times 10^{- 3}} \\ d_{min} & = 41.9 \times 10^{- 7} \\ d_{min} & ◻ 4.2 μ m \end{aligned}$

AP EAMCET (22.04.2018) Shift-II

Ray Optics

282903 Match List I with List II and select the correct answer using the code given below the Lists:
| | List I
(Disease) | List II
(Remedy) | |
| :--- | :--- | :--- | :--- |
| A. | Hypermetropia | 1. | Concave lens |
| B. | Presbyopia | 2. | bifocal lens |
| C. | Myopia | 3. | Surgery |
| D | Cataract | 4. | Convex lens |

1 **A** -4,**B** -2,**C** -1,**D** -3

2 **A** -4,**B** -1,**C** -2,**D** -3

3 **A** -3,**B** -1,**C** -2,**D** -4

4 **A** -3,**B** -2,**C** -1,**D** -4

NDA (I) 2017

Ray Optics

282904 The ratio of resolving powers of an optical microscope for two wavelengths $λ_{1} = 4000 \AA$ and $λ_{2} = 6000 \AA$ is

1

8 : 27

2

9 : 4

3

3 : 2

4

16 : 81

Explanation:

C: Given, $λ_{1} = 4000 \AA, λ_{2} = 6000 \AA$ We know that, Resolving power $(R) \propto \frac{1}{λ}$
$∴ \begin{aligned} \frac{R_{1}}{R_{2}} & = \frac{λ_{2}}{λ_{1}} \\ \frac{R_{1}}{R_{2}} & = \frac{6000 \AA}{4000 \AA} \\ R_{1} : & R_{2} = 3 : 2 \end{aligned}$

NEET- 2017

Ray Optics

282900 Which of the following produces virtual image?

1 Simple microscope

2 Ordinary camera

3 Projector

4 Cinemascope

AIIMS-26.05.2018(M)

Ray Optics

282901 In a simple microscope of focal length $5 cm$ , final image is formed at $D (D = 25 cm)$ , then its magnification will be :

1 6

2 5

3 2

4 1

Explanation:

A: Given that,
$f = 5 cm, D = 25 cm$
Magnification, $m = 1 + \frac{D}{f}$
$\begin{array}{r} m = 1 + \frac{25}{5} \\ m = 6 \end{array}$

AIIMS-26.05.2018(M)

Ray Optics

282902 A microscope has an objective of aperture 8 $mm$ and focal length of $5 cm$ . The minimum separation between two objects to be just resolved by the microscope is (wavelength of light used = $5500 \AA$ )

1

2.2 μ m

2

3.4 μ m

3

4.2 μ m

4

3.6 μ m

Explanation:

C: Given, focal length, $f = 5 cm$
Wavelength, $λ = 5500 \AA$
Diameter, $D = 8 mm$
$\begin{aligned} d_{min} = \frac{1.22 f λ}{D} & = \frac{1.22 \times 5 \times 10^{- 2} \times 5500 \times 10^{- 10}}{8 \times 10^{- 3}} \\ d_{min} & = 41.9 \times 10^{- 7} \\ d_{min} & ◻ 4.2 μ m \end{aligned}$

AP EAMCET (22.04.2018) Shift-II

Ray Optics

282903 Match List I with List II and select the correct answer using the code given below the Lists:
| | List I
(Disease) | List II
(Remedy) | |
| :--- | :--- | :--- | :--- |
| A. | Hypermetropia | 1. | Concave lens |
| B. | Presbyopia | 2. | bifocal lens |
| C. | Myopia | 3. | Surgery |
| D | Cataract | 4. | Convex lens |

1 **A** -4,**B** -2,**C** -1,**D** -3

2 **A** -4,**B** -1,**C** -2,**D** -3

3 **A** -3,**B** -1,**C** -2,**D** -4

4 **A** -3,**B** -2,**C** -1,**D** -4

NDA (I) 2017

Ray Optics

282904 The ratio of resolving powers of an optical microscope for two wavelengths $λ_{1} = 4000 \AA$ and $λ_{2} = 6000 \AA$ is

1

8 : 27

2

9 : 4

3

3 : 2

4

16 : 81

Explanation:

C: Given, $λ_{1} = 4000 \AA, λ_{2} = 6000 \AA$ We know that, Resolving power $(R) \propto \frac{1}{λ}$
$∴ \begin{aligned} \frac{R_{1}}{R_{2}} & = \frac{λ_{2}}{λ_{1}} \\ \frac{R_{1}}{R_{2}} & = \frac{6000 \AA}{4000 \AA} \\ R_{1} : & R_{2} = 3 : 2 \end{aligned}$

NEET- 2017

Ray Optics

282900 Which of the following produces virtual image?

1 Simple microscope

2 Ordinary camera

3 Projector

4 Cinemascope

AIIMS-26.05.2018(M)

Ray Optics

282901 In a simple microscope of focal length $5 cm$ , final image is formed at $D (D = 25 cm)$ , then its magnification will be :

1 6

2 5

3 2

4 1

Explanation:

A: Given that,
$f = 5 cm, D = 25 cm$
Magnification, $m = 1 + \frac{D}{f}$
$\begin{array}{r} m = 1 + \frac{25}{5} \\ m = 6 \end{array}$

AIIMS-26.05.2018(M)

Ray Optics

282902 A microscope has an objective of aperture 8 $mm$ and focal length of $5 cm$ . The minimum separation between two objects to be just resolved by the microscope is (wavelength of light used = $5500 \AA$ )

1

2.2 μ m

2

3.4 μ m

3

4.2 μ m

4

3.6 μ m

Explanation:

C: Given, focal length, $f = 5 cm$
Wavelength, $λ = 5500 \AA$
Diameter, $D = 8 mm$
$\begin{aligned} d_{min} = \frac{1.22 f λ}{D} & = \frac{1.22 \times 5 \times 10^{- 2} \times 5500 \times 10^{- 10}}{8 \times 10^{- 3}} \\ d_{min} & = 41.9 \times 10^{- 7} \\ d_{min} & ◻ 4.2 μ m \end{aligned}$

AP EAMCET (22.04.2018) Shift-II

Ray Optics

282903 Match List I with List II and select the correct answer using the code given below the Lists:
| | List I
(Disease) | List II
(Remedy) | |
| :--- | :--- | :--- | :--- |
| A. | Hypermetropia | 1. | Concave lens |
| B. | Presbyopia | 2. | bifocal lens |
| C. | Myopia | 3. | Surgery |
| D | Cataract | 4. | Convex lens |

1 **A** -4,**B** -2,**C** -1,**D** -3

2 **A** -4,**B** -1,**C** -2,**D** -3

3 **A** -3,**B** -1,**C** -2,**D** -4

4 **A** -3,**B** -2,**C** -1,**D** -4

NDA (I) 2017

Ray Optics

282904 The ratio of resolving powers of an optical microscope for two wavelengths $λ_{1} = 4000 \AA$ and $λ_{2} = 6000 \AA$ is

1

8 : 27

2

9 : 4

3

3 : 2

4

16 : 81

Explanation:

C: Given, $λ_{1} = 4000 \AA, λ_{2} = 6000 \AA$ We know that, Resolving power $(R) \propto \frac{1}{λ}$
$∴ \begin{aligned} \frac{R_{1}}{R_{2}} & = \frac{λ_{2}}{λ_{1}} \\ \frac{R_{1}}{R_{2}} & = \frac{6000 \AA}{4000 \AA} \\ R_{1} : & R_{2} = 3 : 2 \end{aligned}$

NEET- 2017

Ray Optics

282900 Which of the following produces virtual image?

1 Simple microscope

2 Ordinary camera

3 Projector

4 Cinemascope

AIIMS-26.05.2018(M)

Ray Optics

282901 In a simple microscope of focal length $5 cm$ , final image is formed at $D (D = 25 cm)$ , then its magnification will be :

1 6

2 5

3 2

4 1

Explanation:

A: Given that,
$f = 5 cm, D = 25 cm$
Magnification, $m = 1 + \frac{D}{f}$
$\begin{array}{r} m = 1 + \frac{25}{5} \\ m = 6 \end{array}$

AIIMS-26.05.2018(M)

Ray Optics

282902 A microscope has an objective of aperture 8 $mm$ and focal length of $5 cm$ . The minimum separation between two objects to be just resolved by the microscope is (wavelength of light used = $5500 \AA$ )

1

2.2 μ m

2

3.4 μ m

3

4.2 μ m

4

3.6 μ m

Explanation:

C: Given, focal length, $f = 5 cm$
Wavelength, $λ = 5500 \AA$
Diameter, $D = 8 mm$
$\begin{aligned} d_{min} = \frac{1.22 f λ}{D} & = \frac{1.22 \times 5 \times 10^{- 2} \times 5500 \times 10^{- 10}}{8 \times 10^{- 3}} \\ d_{min} & = 41.9 \times 10^{- 7} \\ d_{min} & ◻ 4.2 μ m \end{aligned}$

AP EAMCET (22.04.2018) Shift-II

Ray Optics

282903 Match List I with List II and select the correct answer using the code given below the Lists:
| | List I
(Disease) | List II
(Remedy) | |
| :--- | :--- | :--- | :--- |
| A. | Hypermetropia | 1. | Concave lens |
| B. | Presbyopia | 2. | bifocal lens |
| C. | Myopia | 3. | Surgery |
| D | Cataract | 4. | Convex lens |

1 **A** -4,**B** -2,**C** -1,**D** -3

2 **A** -4,**B** -1,**C** -2,**D** -3

3 **A** -3,**B** -1,**C** -2,**D** -4

4 **A** -3,**B** -2,**C** -1,**D** -4

NDA (I) 2017

Ray Optics

282904 The ratio of resolving powers of an optical microscope for two wavelengths $λ_{1} = 4000 \AA$ and $λ_{2} = 6000 \AA$ is

1

8 : 27

2

9 : 4

3

3 : 2

4

16 : 81

Explanation:

C: Given, $λ_{1} = 4000 \AA, λ_{2} = 6000 \AA$ We know that, Resolving power $(R) \propto \frac{1}{λ}$
$∴ \begin{aligned} \frac{R_{1}}{R_{2}} & = \frac{λ_{2}}{λ_{1}} \\ \frac{R_{1}}{R_{2}} & = \frac{6000 \AA}{4000 \AA} \\ R_{1} : & R_{2} = 3 : 2 \end{aligned}$

NEET- 2017

Ray Optics

282900 Which of the following produces virtual image?

1 Simple microscope

2 Ordinary camera

3 Projector

4 Cinemascope

AIIMS-26.05.2018(M)

Ray Optics

282901 In a simple microscope of focal length $5 cm$ , final image is formed at $D (D = 25 cm)$ , then its magnification will be :

1 6

2 5

3 2

4 1

Explanation:

A: Given that,
$f = 5 cm, D = 25 cm$
Magnification, $m = 1 + \frac{D}{f}$
$\begin{array}{r} m = 1 + \frac{25}{5} \\ m = 6 \end{array}$

AIIMS-26.05.2018(M)

Ray Optics

282902 A microscope has an objective of aperture 8 $mm$ and focal length of $5 cm$ . The minimum separation between two objects to be just resolved by the microscope is (wavelength of light used = $5500 \AA$ )

1

2.2 μ m

2

3.4 μ m

3

4.2 μ m

4

3.6 μ m

Explanation:

C: Given, focal length, $f = 5 cm$
Wavelength, $λ = 5500 \AA$
Diameter, $D = 8 mm$
$\begin{aligned} d_{min} = \frac{1.22 f λ}{D} & = \frac{1.22 \times 5 \times 10^{- 2} \times 5500 \times 10^{- 10}}{8 \times 10^{- 3}} \\ d_{min} & = 41.9 \times 10^{- 7} \\ d_{min} & ◻ 4.2 μ m \end{aligned}$

AP EAMCET (22.04.2018) Shift-II

Ray Optics

282903 Match List I with List II and select the correct answer using the code given below the Lists:
| | List I
(Disease) | List II
(Remedy) | |
| :--- | :--- | :--- | :--- |
| A. | Hypermetropia | 1. | Concave lens |
| B. | Presbyopia | 2. | bifocal lens |
| C. | Myopia | 3. | Surgery |
| D | Cataract | 4. | Convex lens |

1 **A** -4,**B** -2,**C** -1,**D** -3

2 **A** -4,**B** -1,**C** -2,**D** -3

3 **A** -3,**B** -1,**C** -2,**D** -4

4 **A** -3,**B** -2,**C** -1,**D** -4

NDA (I) 2017

Ray Optics

282904 The ratio of resolving powers of an optical microscope for two wavelengths $λ_{1} = 4000 \AA$ and $λ_{2} = 6000 \AA$ is

1

8 : 27

2

9 : 4

3

3 : 2

4

16 : 81

Explanation:

C: Given, $λ_{1} = 4000 \AA, λ_{2} = 6000 \AA$ We know that, Resolving power $(R) \propto \frac{1}{λ}$
$∴ \begin{aligned} \frac{R_{1}}{R_{2}} & = \frac{λ_{2}}{λ_{1}} \\ \frac{R_{1}}{R_{2}} & = \frac{6000 \AA}{4000 \AA} \\ R_{1} : & R_{2} = 3 : 2 \end{aligned}$

NEET- 2017