Download App

Light – Reflection and Refraction — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
MCQ
A student focused the image of a distant object using a device ‘X’ on a while screen ‘S’ as shown in the figure. If the distance of the screen from the device is 40 cm, select the correct statement about the device.
  • A
    The device X is a convex lens of focal length 20 cm.
  • B
    The device X is a concave mirror of focal length 40 cm.
  • C
    The device X is a convex mirror of radius of curvature 40 cm.
  • D
    The device X is a convex lens of focal length 40 cm.
✓

Answer

  1. The device X is a convex lens of focal length 40 cm.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Phy-1M]" from Light – Reflection and Refraction→Light – Reflection and Refraction — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

If a magnification of, -1(minus 1) is obtained by using a converging lens, then the object has to be placed:
→
Electricians wear rubber gloves because:
→
The animal which does not have eyes that look sideways is:
→
The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has:
→
A student traces the path of a ray of light passing through a rectangular glass slab for three different values of angle of incidence (i) namely $30^{\circ}, 45^{\circ}, 60^{\circ}$. He produces the incident ray and measures the perpendicular distance, $l$, between the produced incident ray and the emergent ray.
Image 
He will observe that
→
Which of the following statement(s) is/are correct regarding scattering of light?
i. Scattering is responsible for the bluish appearance of the sky.
ii. Clouds having droplets of water scatter all wavelengths almost equal and so are generally white.
iii. Advanced sunrise and delayed sunset are due to atmospheric reflection.
→
If the key in the arrangement as shown below is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are.
→
A student sitting on the last bench in the class cannot read the writing on the blackboard clearly but he can read the book lying on his de clearly. Which of the following statement is correct about the student?
  1. The near point of his eyes has receded away.
  2. The near point of his eyes has come close to him.
  3. The far point of his eyes has receded away.
  4. The far point of his eyes has come closer to him.
→
Which of the following can form a virtual image which is always smaller than the object?
→
The major component of biogas is:
  1. Hydrogen.
  2. Butane.
  3. Hydrogen sulphide.
  4. Methane.
→