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Science MCQ (1 Marks)

Light: Shadows and Reflections · Gujarat Board (GSEB) STD 7 (GSEB - English Medium). 41 questions.

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MCQ (1 Marks)

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41 questions · auto-graded multiple-choice test.

MCQ 21 Mark
If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be
  • A
    2 m
  • ✓
    1 m
  • C
    0.5 m
  • D
    0.25 m
Answer
Correct option: B.
1 m
B
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MCQ 51 Mark
Image formed by the pinhole camera is
  • ✓
    erect
  • B
    inverted
  • C
    sometimes erected, sometimes inverted
  • D
    all of these.
Answer
Correct option: A.
erect
A
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MCQ 61 Mark
Four students A, B, C and D looked through pipes of different shapes to see a candle flame as shown in Fig.
Image
Who will be able to see the candle flame clearly?
  • A
    A
  • B
    B
  • C
    C
  • ✓
    D
Answer
Correct option: D.
D
D
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MCQ 71 Mark
Which of the following is a non-luminous object?
  • A
    Sun
  • B
    Lamp
  • ✓
    Eraser
  • D
    Tube light
Answer
Correct option: C.
Eraser
C
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MCQ 81 Mark
Shadows give us information about
  • A
    shape of source
  • ✓
    shape of object
  • C
    surface
  • D
    size of object.
Answer
Correct option: B.
shape of object
B
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MCQ 91 Mark
On the basis of passage of light, objects are classified into
  • A
    four types
  • B
    five types
  • ✓
    three types
  • D
    none
Answer
Correct option: C.
three types
C
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MCQ 101 Mark
Which of the following can never form acircular shadow?
  • A
    A ball
  • B
    A flat disc
  • ✓
    A shoe box
  • D
    An ice cream cone
Answer
Correct option: C.
A shoe box
C
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MCQ 111 Mark
The light is passed through object ‘A’ completely then ‘A’ is
  • A
    translucent
  • B
    opaque
  • ✓
    transparent
  • D
    none of these.
Answer
Correct option: C.
transparent
C
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MCQ 121 Mark
Which of the following is/are not always necessary to observe a shadow?
  • ✓
    Sun
  • B
    Screen
  • C
    Source of light
  • D
    Opaque object
Answer
Correct option: A.
Sun
A
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MCQ 131 Mark
Column AColumn B
1. Translucent objects(A) Different patterns every time
2. Kaleidoscope(B) Light passes partially
3. Opaque objects(C) Light do not pass
4. Light(D) Travels in a straight line
  • A
    (1)-(A), (2)-(B), (3)-(C), (4)-(D)
  • ✓
    (1)-(B), (2)-(A), (3)-(C), (4)-(D)
  • C
    (1)-(C), (2)-(D), (3)-(A), (4)-(B)
  • D
    (1)-(D), (2)-(C), (3)-(B), (4)-(A)
Answer
Correct option: B.
(1)-(B), (2)-(A), (3)-(C), (4)-(D)
B
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MCQ 141 Mark
A periscope works on the principle of:
  • A
    Refraction
  • B
    Diffusion
  • ✓
    Reflection
  • D
    Absorption
Answer
Correct option: C.
Reflection
C
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MCQ 151 Mark
Light travels in a:
  • A
    Curved path
  • B
    Wavy path
  • ✓
    Straight line
  • D
    Zigzag path
Answer
Correct option: C.
Straight line
C
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MCQ 161 Mark
Which of the following is a luminous object?
  • A
    Moon Light travels in a:
  • B
    Mirror
  • ✓
    Sun
  • D
    Book
Answer
Correct option: C.
Sun
C
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MCQ 171 Mark
Which instrument uses two plane mirrors?
  • A
    Microscope
  • B
    Telescope
  • C
    Kaleidoscope
  • ✓
    Periscope
Answer
Correct option: D.
Periscope
D
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MCQ 181 Mark
Kaleidoscope forms:
  • A
    Sound patterns
  • B
    Random colours
  • C
    Fixed designs
  • ✓
    Beautiful patterns
Answer
Correct option: D.
Beautiful patterns
D
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MCQ 191 Mark
Periscope works on the principle of
  • A
    Refraction
  • B
    Dispersion
  • ✓
    Reflection
  • D
    Absorption
Answer
Correct option: C.
Reflection
C
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MCQ 201 Mark
Which of the following is not a source of light?
  • A
    Bulb
  • B
    Sun
  • ✓
    Paper
  • D
    Lighting candle
Answer
Correct option: C.
Paper
C
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MCQ 211 Mark
The basic requirement to form a shadow is:
  • A
    Only light
  • B
    Only object
  • ✓
    Light, opaque object, screen
  • D
    Transparent object
Answer
Correct option: C.
Light, opaque object, screen
C
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MCQ 221 Mark
Shadows are always:
  • A
    Coloured
  • B
    Smaller than object
  • ✓
    Black or faint
  • D
    Transparent
Answer
Correct option: C.
Black or faint
C
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MCQ 241 Mark
Transparent objects:
  • A
    Block light
  • B
    Partially allow light
  • ✓
    Fully allow light
  • D
    Reflect light
Answer
Correct option: C.
Fully allow light
C
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MCQ 251 Mark
The pinhole camera image is:
  • A
    Erect
  • B
    Laterally inverted
  • ✓
    Inverted
  • D
    Magnified
Answer
Correct option: C.
Inverted
C
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MCQ 261 Mark
Which image property is correct for plane mirror?
  • A
    Inverted and small
  • ✓
    Erect and same size
  • C
    Magnified and inverted
  • D
    Diminished and real
Answer
Correct option: B.
Erect and same size
B
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MCQ 271 Mark
A shadow is formed when:
  • A
    Light bends
  • B
    Light is reflected
  • ✓
    Light is blocked
  • D
    Light passes
Answer
Correct option: C.
Light is blocked
C
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MCQ 281 Mark
Which mirror forms lateral inversion?
  • ✓
    Plane mirror
  • B
    Convex mirror
  • C
    Concave mirror
  • D
    None of these
Answer
Correct option: A.
Plane mirror
A
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MCQ 291 Mark
Reflection is the:
  • A
    Bending of light
  • B
    Scattering of light
  • C
    Passing of light through objects
  • ✓
    Change in direction of light by a shiny surface
Answer
Correct option: D.
Change in direction of light by a shiny surface
D
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MCQ 301 Mark
Which material allows partial passage of light?
  • A
    Wood
  • B
    Glass
  • ✓
    Tracing paper
  • D
    Mirror
Answer
Correct option: C.
Tracing paper
C
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MCQ 311 Mark
What type of object forms a dark shadow?
  • A
    Transparent
  • B
    Translucent
  • ✓
    Opaque
  • D
    Luminous
Answer
Correct option: C.
Opaque
C
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MCQ 321 Mark
An astronaut in a spacecraft observes a shadow of a tool floating in front of a spotlight. The shadow appears sharp and clear. What can be inferred about the nature of light in space?
  • A
    Light spreads in all directions.
  • B
    Light needs air to travel.
  • ✓
    Light travels in straight lines even in vacuum.
  • D
    Light is scattered in space due to dust.
Answer
Correct option: C.
Light travels in straight lines even in vacuum.
C
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MCQ 331 Mark
Which one of the following cannot form an image on a screen?
  • ✓
    Plane mirror
  • B
    Concave mirror (for real image)
  • C
    Pinhole camera
  • D
    Convex lens (for real image)
Answer
Correct option: A.
Plane mirror
A
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MCQ 341 Mark
In a kaleidoscope with 3 mirrors placed at $60^{\circ}$ angles, how many beautiful image patterns are observed?
  • A
    2
  • B
    3
  • C
    6
  • ✓
    Infinite
Answer
Correct option: D.
Infinite
D
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MCQ 351 Mark
Which of the following statements is correct regarding images formed by a plane mirror?
  • A
    Image can be captured on screen
  • B
    Image is smaller than the object
  • ✓
    Image is virtual and erect
  • D
    Image is formed behind the mirror and inverted
Answer
Correct option: C.
Image is virtual and erect
C
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MCQ 361 Mark
Which of the following changes will result in a larger shadow of an object placed between a light source and a screen?
  • A
    Moving the light source farther from the object
  • B
    Moving the screen closer to the object
  • ✓
    Moving the object closer to the light source
  • D
    Tilting the object sideways
Answer
Correct option: C.
Moving the object closer to the light source
C
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MCQ 371 Mark
A torchlight is shone on a translucent material. The observer on the other side sees a faint light but not the object clearly. Why?
  • A
    Light is absorbed completely.
  • ✓
    Light passes partially.
  • C
    Object is opaque.
  • D
    Light bends completely.
Answer
Correct option: B.
Light passes partially.
B
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MCQ 381 Mark
In a periscope, the two mirrors must be kept at what angle to the tube surface to ensure proper vision?
  • A
    $30^{\circ}$
  • ✓
    $45^{\circ}$
  • C
    $60^{\circ}$
  • D
    $90^{\circ}$
Answer
Correct option: B.
$45^{\circ}$
B
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MCQ 391 Mark
In a dark room, a small hole is made in the window curtain, and a tree outside is visible on the wall. What optical device does this mimic?
  • A
    Mirror
  • B
    Lens
  • C
    Prism
  • ✓
    Pinhole camera
Answer
Correct option: D.
Pinhole camera
D
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MCQ 401 Mark
An object is placed at a certain distance from a plane mirror. If the object moves 3 cm closer to the mirror, how much closer will its image appear to be?
  • A
    1.5 cm
  • B
    3 cm
  • ✓
    6 cm
  • D
    0 cm
Answer
Correct option: C.
6 cm
C
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MCQ 411 Mark
A ray of light hits a plane mirror at an angle of $35^{\circ}$ with the surface of the mirror. What will be the angle between the incident and the reflected ray?
  • A
    $70^{\circ}$
  • ✓
    $110^{\circ}$
  • C
    $55^{\circ}$
  • D
    $90^{\circ}$
Answer
Correct option: B.
$110^{\circ}$
B
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MCQ (1 Marks) - Science STD 7 Questions - Vidyadip