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Light Science - Light

Jharkhand Board (JAC) - STD 7 - Science (Jharkhand - English Medium). 361 questions in this chapter.

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361 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

361
Questions
7
Question groups
5
Question types
Sample Questions

Light questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ (1 Marks)1 Mark
The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of $2\ m/s.$ The driver sees in his rear view mirror the image of truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be
  • A
    $1\ m/s$
  • B
    $2\ m/s$
  • ✓
    $4\ m/s$
  • D
    $8\ m/s$

Answer: C.

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Q 2MCQ (1 Marks)1 Mark
David is observing his image in a plane mirror. The distance between the mirror and his image is $4 m.$ If he moves $1 m$ towards the mirror, then the distance between David and his image will be.
  • A
    $3 m$
  • B
    $5 m$
  • ✓
    $6 m$
  • D
    $8 m$

Answer: C.

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Q 4MCQ (1 Marks)1 Mark
Nature of the image formed by a plane mirror is:
  • A
    Virtual and erect
  • B
    Of the same size as the object
  • C
    Laterally inverted
  • ✓
    All of these

Answer: D.

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Q 5MCQ (1 Marks)1 Mark
What will be the condition of image when you stand in front of a plane flat mirror and look at yourself and you raise your right hand?
  • A
    Erect and enlarged
  • B
    Erect and reduced
  • ✓
    Erect and reversed
  • D
    Inverted and reversed

Answer: C.

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Q 191 Marks Question1 Mark
As we know that an image is formed by the actual intersection of rays and can be obtained on the screen. So, state whether it is real or virtual image.
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Q 232 Marks Questions2 Marks
It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens? If you keep on decreasing the distance between the object and the lens, will you still able to obtain the image on the screen? Explain.
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Q 283 Marks Question3 Marks
Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
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Q 315 Marks Questions5 Marks
Match the items given in Column $I$ with one or more items of Column $II.$
Column I Column II
A plane mirror Used as a magnifying glass.
A convex mirror Can form image of objects spread over a large area.
A convex lens Used by dentists to see enlarged image of teeth.
A concave mirror The image is always inverted and magnified.
A concave lens The image is erect and of the same size as the object.
  The image is erect and smaller in size than the object
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