Tag: physics

Questions Related to physics

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

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

  1. Concave lens

  2. Concave mirror

  3. Convex mirror

  4. Plane mirror

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Correct Option: B
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. 

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

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

  1. Real

  2. Virtual

  3. Diverging

  4. Converging

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Correct Option: B
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.

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.

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

  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.

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Correct Option: D
Explanation:

Virtual image can be photographed.

The image formed by a convex mirror of a real object is

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

  1. virtual and erect

  2. virtual and inverted

  3. real and erect

  4. real and inverted

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Correct Option: A

A driving mirror on a car is never concave because :

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

  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.

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Correct Option: A
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

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

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

  1. $12.1 cm$

  2. $13.1 cm$

  3. $11.1 cm$

  4. $14.2 cm$

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Correct Option: C
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.

 The time in a clock is $8 : 40 : 10$.The time in the image of the clock formed by plane mirror is 

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

  1. $8 : 40 : 10$

  2. $8 : 50 : 30$

  3. $3 : 19 : 50$

  4. none of these

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Correct Option: C

When a plane mirror is rotated through an angle $  \theta,  $ the reflected ray turms an angle $2  \theta  $ , then the size of the image is

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

  1. Doubled

  2. Halved

  3. Remains the same

  4. Becomes infinite

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Correct Option: A

A fish is near the centre of a spherical water filled fish bowl. A child standard 2R (R is radius of curvature of the sphere) from the centre of the bowl. The centre would the child's noe appear to the fish situated at the centre?

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

  1. 4R

  2. 2R

  3. 3R

  4. R

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Correct Option: A

Choose the correct options.

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

  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.

Show answer
Correct Option: B
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.