Physics

Light and Mirrors

458 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 movie projector forms real images. Why is it not inverted?

  1. Real images are erect in nature.

  2. Final image is formed using virtual image.

  3. Multiple mirrors are used

  4. Films are inverted
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A movie projector uses two mirrors. First is used to concentrate light source and second is used to focus the images on the screen. Since images are inverted twice, final images are erect. 

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

A virtual image larger than the object can be produced by a

  1. Concave lens

  2. Concave mirror

  3. Convex mirror

  4. Plane mirror
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A $ \bf{concave\ lens} $ always produces virtual, erect and diminished images and the decrease in the size of the image depends on the position of the object.

$ \bf{Concave\ mirrors} $ produce real and virtual, erect and inverted, diminished same sized and magnified image depending upon the position of the object on the principal axis. But the concave mirror forms a virtual and enlarged image when the object is placed between the Focus and the pole of the mirror.

$ \bf{Convex\ mirrors} $ always produce a virtual, erect and diminished image and the decrease in size of image depends on the position of the object in front of the mirror.


$ \bf{Plane\ Mirrors} $ always produce a virtual and erect image having the same size as that of the object irrespective of the position of object.

Hence, the correct answer is OPTION B. 

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

Read the following statements and select the correct option.
Statement 1: It is not possible to photograph a virtual image.
Statement 2: An image is said to be virtual if the reflected or refracted rays are diverging in nature.

  1. Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.

  2. Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1.

  3. Statement 1 is true but statement 2 is false.

  4. Statement 1 is false but statement 2 is true.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Virtual image can be photographed.

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

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

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.