Home
Class 12
PHYSICS
Exposure time of a camera lens at the (f...

Exposure time of a camera lens at the `(f)/(2.8)` setting is `(1)/(200)` second. The correct time of exposure at `(f)/(5.6)` is

A

0.20 second

B

0.40 second

C

0.02 second

D

0.04 second

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    FULL MARKS|Exercise ADDITIONAL QUESITON - II ADDITIONAL PROBLEMS:|11 Videos

  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED V.NUMERICAL PROBLEMS|10 Videos

  • MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED - NUMERICAL PROBLEMS :|4 Videos

  • RECENT DEVELOPMENTS IN PHYSICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS (Short Answer Question)|6 Videos

Similar Questions

Explore conceptually related problems

A photographic plate placed at a distance of 5 cm from a weak point source is exposed for 3 s. If the plate is kept at a distance of 10 cm from the source, the time needed for the same exposure is

The camera lens has an aperture of f and the exposure time is 1/60 s. What will be the new exposure time if the aperture become 1.4 f?

Let F_(1) be the set of parallelograms, F_(2) the set of rectangle , F_(3) the set of rhombuses, F_(4) the set of squares and F_(5) the set of trapeziums in a plane. Then, F_(1) may be equal to

Compute (8!)/(6! xx 2!)

The function f: RvecR satisfies f(x^2)dotf^(x)=f^(prime)(x)dotf^(prime)(x^2) for all real xdot Given that f(1)=1 and f^(1)=8 , then the value of f^(prime)(1)+f^(1) is 2 b. 4 c. 6 d. 8

Let f(x) be a polynomial satisfying lim_(xtooo) (x^(2)f(x))/(2x^(5)+3)=6" and "f(1)=3,f(3)=7" and "f(5)=11. Then The value of f(0) is

If an object is placed between F_(1)" and " 2F_(1) of a convex lens, then nature of the image formed is ………….

If f={(6,3) (8,9) (5,3) (-1,6)} then the pre-images of 3 are ……………… .

The graph of a function fx) which is defined in [-1, 4] is shown in the adjacent figure. Identify the correct statement(s). (1) domain of f(|x|)-1) is [-5,5] (2) range of f(|x|+1) is [0,2] (3) range of f(-|x|) is [-1,0] (4) domain of f(|x|) is [-3,3]

FULL MARKS-OPTICS-ADDITIONAL QUESITON -( MULTIPLE CHOICE QUESTIONS )
  1. The blue colour of the sky is due to the phenomenon of

    Text Solution

    |

  2. An astronomical telescope of ten fild angular magnification has a leng...

    Text Solution

    |

  3. Exposure time of a camera lens at the (f)/(2.8) setting is (1)/(200) s...

    Text Solution

    |

  4. Which of the following is not due to total internal reflection?

    Text Solution

    |

  5. An object is at a distance of 0.5 in front of a plane mirror. Distance...

    Text Solution

    |

  6. An object moves towards a stationary plane mirror at a speed of 4 ms^(...

    Text Solution

    |

  7. If two mirrors are kept at 60^(@) to each other and a body is placed...

    Text Solution

    |

  8. If an object is placed at 10 cm infront of a concave mirror of focal ...

    Text Solution

    |

  9. An object of length 2.5 cm is placed at the principal axis of a concav...

    Text Solution

    |

  10. Which of the following mirror is used by a dentist to examine a small ...

    Text Solution

    |

  11. When a ray of light enters from one medium to another, then which of...

    Text Solution

    |

  12. When light travels from one medium to the other medium of which the re...

    Text Solution

    |

  13. The time taken by the light to cross a glass of thickness 4 mm and ref...

    Text Solution

    |

  14. The critical angle of a medium with respect to air is 45^(@). The refr...

    Text Solution

    |

  15. If the critical angle for total internal reflection from a medium to v...

    Text Solution

    |

  16. When a ray of light enter from one medium to another, its velocity is ...

    Text Solution

    |

  17. A driver at a depth 12 m inside water (mu = 4//3) see the sky in a con...

    Text Solution

    |

  18. The principal behind optical fibres is

    Text Solution

    |

  19. Air bubble in water behaves as

    Text Solution

    |

  20. A convex lens of 40 cm focal length is combined with a concave lens of...

    Text Solution

    |