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Questions Related to physics

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

Name the type of image which can not be obtained on a screen

  1. Real

  2. Virtual

  3. Diverging

  4. Converging
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
$ \bf{Real\ Images}$ are images which can be obtained on the screen. They are formed when light rays after getting reflected from a mirror actually meet at a point.

$ \bf{Virtual\ Images} $ are images which can only be seen in a mirror but cannot be obtained on the screen. They are formed when light rays after getting reflected from a mirror appear to meet at a point. 

There are no types of images as diverging and converging images.

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

An arrow is placed at a distance of 25 cm from a diverging mirror of focal length 20 cm. Find the image distance.

  1. <span>$12.1 cm$</span>

  2. <span>$13.1 cm$</span>

  3. <span>$11.1 cm$</span>

  4. <span>$14.2 cm$</span>
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Given,

$u=-25cm$
$f=+20cm$
$v=?$
From mirror formula,
$\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}$

$\dfrac{1}{20}=\dfrac{1}{-25}+\dfrac{1}{v}$

$\dfrac{1}{v}=\dfrac{9}{100}$

$v=\dfrac{100}{9}cm$

$v=11.1cm$
The correct option is C.

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.