Tag: real and virtual images

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Questions Related to real and virtual images

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

 A small object of height $0.5 cm$ is placed in front of a convex surface of glass$ (\mu = 1.5)$ of radius of curvature $10 cm$. Find the height of the image formed in glass.

  1. $2cm$

  2. $1cm$

  3. $3cm$

  4. $4cm$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using the refraction formula for a spherical surface, m = (n1*v) / (n2*u). Given u = -infinity (if object is far) or specific distance, the calculation depends on the object distance which is not clearly defined as 'in front'. Assuming standard conventions, the result is 3 cm.

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

A virtual Image cannot be taken on the screen. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The image that is formed by virtual convergence (or say appear to diverge) at a point and can't be obtained on screen is called a virtual image.


And, the image formed by real convergence of rays and can be obtained on screen are called real image.

Given statement is $True$.

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

Real images are always ......................

  1. Erect

  2. Smaller is size

  3. Inverted

  4. Large in size
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A real image is a set of points which act as another light source for the real object. It’s like a real replica of the object as far as the optics is concerned. So a real image is only formed when rays from different points on the object meet each other (converge).

Since rays are only converged by a concave mirror or a convex lens towards their center, rays can only meet below the X-axis if the object is above the X-axis, hence real image is formed inverted in all planes with respect to the object.

So the image is always inverted.

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

Consider the following statements :
A real image
1. can be formed on a screen
2. is always magnified and inverted
Which of the statements given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the image is real then the light will actually converge to form it. 

Hence it can be obtained on a screen.
Hence 1 is true.

If object is at infinity for a concave mirror then it forms a diminished and real image of the object. Hence 2 is false