Home
Class 12
PHYSICS
Assertion:Image formed by concave lens i...

Assertion:Image formed by concave lens is not always virtual.
Reason:Image formed by a lens is real if the image is formed in the direction of ray of light with respect to the lens.

A

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C

If both Assertion is true, but the Reason is false.

D

If both Assertion is false but the Reason is true.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze both the assertion and the reason provided. ### Step 1: Analyze the Assertion The assertion states that "the image formed by a concave lens is not always virtual." - **Understanding Concave Lenses**: Concave lenses are known to primarily produce virtual images when the object is placed in front of the lens. However, if we consider the case where the object is placed at a distance less than the focal length of the lens, the image formed will indeed be virtual. - **Conclusion on Assertion**: The assertion is misleading because it implies that a concave lens can produce real images, which is typically not the case. Therefore, the assertion is **False**. ### Step 2: Analyze the Reason The reason states that "the image formed by a lens is real if the image is formed in the direction of the ray of light with respect to the lens." - **Understanding Image Formation**: For any lens, a real image is formed when the light rays converge and can be projected onto a screen. This occurs when the object is placed outside the focal length of a convex lens or when the object is placed beyond the focal point of a concave lens (which is not typical). - **Conclusion on Reason**: The reason is generally true for lenses, but it does not specifically apply to concave lenses as it does not address the nature of virtual images formed by them. Therefore, the reason is **True** but does not adequately explain the assertion. ### Step 3: Final Conclusion - Both the assertion and the reason are true statements in their own right, but the reason does not correctly explain the assertion regarding concave lenses. ### Final Answer: - Assertion: False - Reason: True - Conclusion: Both are true, but the reason is not a correct explanation of the assertion. ---
To solve the question, we need to analyze both the assertion and the reason provided. ### Step 1: Analyze the Assertion The assertion states that "the image formed by a concave lens is not always virtual." - **Understanding Concave Lenses**: Concave lenses are known to primarily produce virtual images when the object is placed in front of the lens. However, if we consider the case where the object is placed at a distance less than the focal length of the lens, the image formed will indeed be virtual. - **Conclusion on Assertion**: The assertion is misleading because it implies that a concave lens can produce real images, which is typically not the case. Therefore, the assertion is **False**. ...
Promotional Banner

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    DC PANDEY ENGLISH|Exercise Level 1 Objective|38 Videos

  • REFRACTION OF LIGHT

    DC PANDEY ENGLISH|Exercise Objective Questions|1 Videos

  • REFRACTION OF LIGHT

    DC PANDEY ENGLISH|Exercise Exercise 31.8|8 Videos

  • REFLECTION OF LIGHT

    DC PANDEY ENGLISH|Exercise Subjective|9 Videos

  • SEMICONDUCTORS

    DC PANDEY ENGLISH|Exercise Subjective|12 Videos

Similar Questions

Explore conceptually related problems

A : The image formed by a concave lens is always virtual. R : The rays emerging from a concave lens never meet on the principal axis.

Give reason The image formed by a mirror is virtual whereas the image formed by a pinhole camera is real.

Name the lens that always forms a virtual and erect image.

Choose the following statement a True of False. a. The real image formed by a lens is always inverted. b. The image formed by a lens is always inverted. c. The image formed by a concave lens is always erect and diminished. d. An air bubble inside water acts like a concave lens. e. The distance between a real object and its real image formed by a single lens cannot be more than 4f. f. I an object is moved at a constant speed toward a convex lens from infinity to focus, then its image moves slower in the begninning and faster later on, away from the lens. g. The focal length of a glass (mu=1.5) lens is 10 cm in air. When it is completely immersed in water its focal length will become 40cm.

An object is placed at 10 cm from a lens and real image is formed with magnification of 0.5. Then the lens is

An object is kept in front of a concave lens.What is the nature of the image formed?

The minimum distance between an object and its real image formed by a convex lens is

The minimum distance between an object and its real image formed by a convex lens is

When an object is at distances x and y from a lens, a real image and a virtual image is formed respectively having same magnification. The focal length of the lens is

A real image is formed by a convex lens. Then it is put in contact with a concave lens and again a real image is formed. This image will shift towards the lens system shift away from the lens system remain in its original position shift to infinity