Physics

Light and Mirrors

454 Questions

Light and mirrors questions cover the principles of reflection, image formation, and mirror magnification. Concepts include the properties of plane mirrors, the uses of concave mirrors in solar devices, and the behavior of light rays. These fundamentals are essential general science topics in major competitive examinations.

Plane mirror propertiesConcave mirror applicationsMirror magnification formulaLight reflection lawsImage formation

Light and Mirrors Questions

Multiple choice physics curved mirrors real and virtual image real and virtual images terms related with spherical mirrors

A driving mirror on a car is never concave because :

  1. its field of view is too small.

  2. the image would be inverted.

  3. the image would be virtual and therefore useless for the driver.

  4. only a plane mirror forms true images.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Concave mirrors form an real and inverted image due to which the objects would appear to be inverted,hence are not taken into use for vehicles . And also conave mirrors cover a much lesser field of view

Multiple choice physics curved mirrors real and virtual image real and virtual images terms related with spherical mirrors

Choose the correct options.

  1. If the incident rays are converging, we have a real object.

  2. If the final ray are converging, we have a real image.

  3. The image of a virtual object is called a virtual image.

  4. If the image is virtual, the corresponding object is called a virtual object.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lets go option wise:
A. If the incident rays are converging, that means they are from virtual object very far away. If rays are from a real object, they will be diverging. Hence Option A is wrong. 
B. If final rays are converging, they will definitely intersect and we will have a formation of a virtual image. Hence Option B is correct.
Option C & D are absurd.

Multiple choice physics curved mirrors real and virtual image real and virtual images terms related with spherical mirrors

Which one of the following does not use concave mirror?

  1. Magnifire mirror by dentist

  2. Reflector in flashlight

  3. Solar heater

  4. Rear view mirror in cars
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Concave mirrors are used as shaving mirrors, dentist mirrors, reflectors in flashlights, and solar heaters because they can converge light. Rear view mirrors in cars use convex mirrors to provide a wider, erect, and diminished field of view.

Multiple choice physics curved mirrors real and virtual image real and virtual images terms related with spherical mirrors

A oncave mirror of radius of urvature R is kept on a horizontal table. Water (refractive $ index \mu ) $ is poured into it upto a height t. Where should an object be placed so that its image is ormed at the position of object itself?

  1. $ t \left( 1-\frac { 1 }{ \mu } \right) + R from the mirror $
  2. $ t + R \left( 1-\frac { 1 }{ \mu } \right) from the mirror $
  3. $ \frac {R-t}{\mu} from mirror $
  4. $ t \left( 1-\frac { 1 }{ \mu } \right) + \frac {R}{\mu} from the mirror $
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For the image to form at the object's position, the light rays must strike the mirror normally. This occurs when the object is placed at the center of curvature of the mirror system, accounting for the refraction through the water layer.

Multiple choice physics curved mirrors real and virtual image real and virtual images terms related with spherical mirrors

Which of the following can produce a virtual image for any position of the object?

  1. Plane mirror

  2. Concave mirror

  3. Convex lens

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A plane mirror always produces a virtual, erect, and same-sized image for any real position of an object. Concave mirrors and convex lenses produce real images under certain object positions, so only the plane mirror fits the condition for any position.

Multiple choice

Which type of telescope uses a curved mirror to focus light?

  1. Refracting telescope

  2. Reflecting telescope

  3. Catadioptric telescope

  4. Radio telescope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Reflecting telescopes use a curved mirror to focus light, allowing them to achieve larger apertures and higher light-gathering power compared to refracting telescopes.

Multiple choice

Which type of telescope uses a curved mirror to focus light?

  1. Refracting Telescope

  2. Reflecting Telescope

  3. Catadioptric Telescope

  4. Radio Telescope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Reflecting telescopes use a curved mirror, known as a primary mirror, to focus light and form an image. This design allows for larger apertures and reduces chromatic aberration, making them ideal for observing faint and distant objects.

Multiple choice

Which type of telescope uses a primary mirror to focus light?

  1. Refracting Telescope

  2. Reflecting Telescope

  3. Catadioptric Telescope

  4. Radio Telescope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Reflecting telescopes use a primary mirror to focus light, which is then reflected to a secondary mirror and then to the eyepiece.

Multiple choice

What is the purpose of a diagonal mirror in a telescope?

  1. To reflect the light path at a right angle

  2. To magnify the image of the celestial object

  3. To focus the telescope

  4. To track the movement of celestial objects
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A diagonal mirror is a mirror that is used to reflect the light path at a right angle, allowing the observer to view the image of the celestial object through the eyepiece.

Multiple choice

What is the opposite of barrel distortion?

  1. Pincushion distortion

  2. Mustache distortion

  3. Spherical distortion

  4. Astigmatism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pincushion distortion is the opposite of barrel distortion. In pincushion distortion, straight lines appear to curve inward, resembling the shape of a pincushion. It is commonly observed in telephoto lenses.

Multiple choice

Which of the following is NOT a type of telescope?

  1. Refracting telescope

  2. Reflecting telescope

  3. Radio telescope

  4. Electron microscope
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Electron microscopes are used to magnify very small objects, such as cells and molecules. They do not use lenses or mirrors to collect light, so they are not considered telescopes.

Multiple choice

How can I safely view a partial eclipse?

  1. Use special eclipse glasses.

  2. Use a pinhole projector.

  3. Look at the eclipse through a telescope.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

There are several ways to safely view a partial eclipse, including using special eclipse glasses, using a pinhole projector, or looking at the eclipse through a telescope.

Multiple choice

Which of the following is a type of visual illusion that occurs when the brain misinterprets the size of an object based on its distance?

  1. Müller-Lyer illusion

  2. Ponzo illusion

  3. Ebbinghaus illusion

  4. Delboeuf illusion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Ponzo illusion is a visual illusion in which two lines of equal length appear to be different lengths when they are placed at different distances from a converging or diverging background.