Question

A lens has a hyperfocal distance of 7.5 m. It is focused at 7.5 m. Then

a.

all objects from 7.5 m to infinity will appear in focus

b.

all objects from 3.75 m to infinity will appear in focus

c.

all objects from 0 to 7.5 m will appear in focus

d.

all objects from 0 to 3.75 m will appear in focus

Answer: (b).all objects from 3.75 m to infinity will appear in focus

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. A lens has a hyperfocal distance of 7.5 m. It is focused at 7.5 m. Then

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. In FM 'guard band' is provided

Q. Assertion (A): FM requires more bandwidth than AM

Reason (R): Wide band FM is used for broadcast transmissions.

Q. A frequency doubler has an FM signal input at 13 MHz with a deviation of 5 kHz. The output, frequency for the carrier will be

Q. In FSK no synchronous carrier is needed at the receiver

Q. When the modulating frequency is doubled, the modulation index is halved and the modulating voltage remains constant. The modulation system is

Q. Vividh Bharti programme is transmitted in

Q. In a Vidicon camera tube, the beam current is controlled by

Q. If D is diagonal and F is focal length, lens angle θ is

Q. Present day stereophonic systems have

Q. RF choke used for suppressing interference in TV is generally

Q. Indicate the false statement: To combat noise

Q. Audio and video signals are called modulating waves.

Q. Johnson noise is

Q. Which of the following is unlikely to happen when quantising noise is decreased in PCM?

Q. For real and odd signals, the Fourier series coefficient an is

Q. An amplitude modulated wave is

e = 50 (1 + 0.4 cos 1000 t + 0.3 cos 10000 t) cos 10⁷ t

Q. The efficiency of a horn speaker is about

Q. In AM, if modulation index is more than 100%, then

Q. The width of air gap on recording head in a tape recorder is about

Q. In a stereo tape recorder the speed of the tape is

Recommended Subjects

Are you eager to expand your knowledge beyond Electronics and Communication Engineering? We've handpicked a range of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!