# Ray Optics-Resolving Power of Microscopes and Astronomical Telescopes [NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 4 - 7 of 11

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## Question number: 4

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

### Question

The light gathering power of a camera lens doesn’t depend on

(1) Ratio of focal length and diameter

(2) Product of focal length and diameter

(3) Wavelength of light used

(4) Its diameter

Select the correct answers and mark it according to the following codes:

Codes:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 1 and 3 are correct | |

b. | 2 and 4 are correc | |

c. | 1 and 2 are correct | |

d. | 1,2 and 3 are correct |

## Question number: 5

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

### Question

Resolving power of a microscope doesn’t depend upon

(1) Velocity of light used

(2) Frequency of light used

(3) Focal length of objective

(4) Wavelength of light used

Select the correct answers and mark it according to the following codes:

Codes:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 1 and 2 are correct | |

b. | 2 and 4 are correct | |

c. | 1,2 and 3 are correct | |

d. | 1 and 3 are correct |

## Question number: 6

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

### Question

A glass plate 4 mm thick is viewed from the above through a microscope. The microscope must be lowered 2.58 mm as the operator shifts from viewing the top surface to viewing the bottom surface through the glass. What is the index of refraction of the glass?

### Choices

Choice (4) | Response | |
---|---|---|

a. | 1.21 | |

b. | 1.61 | |

c. | 1.55 | |

d. | 3.24 |

## Question number: 7

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

### Question

An astronomical telescope has an angular magnification of magnitude 5 for distant objects. The separation between the objective and eye-piece is 36 cm and the final image is formed at infinity.

(1) The focal length of objective is 30 cm

(2) The focal length of objective is 25 cm

(3) The focal length of eye piece is 6 cm

(4) The focal length of eye piece is 12 cm

Select the correct answers and mark it according to the following codes:

Codes:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 2 and 4 are correct | |

b. | 1 and 3 are correct | |

c. | 1 and 2 are correct | |

d. | 1,2 and 3 are correct |