An object is placed 30 cm from a concave lens of focal length 15 cm. What is the

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Question: An object is placed 30 cm from a concave lens of focal length 15 cm. What is the nature of the image formed?

Options:

Correct Answer: Virtual and erect

Solution:

For a concave lens, the image formed is virtual and erect when the object is placed in front of it.

An object is placed 30 cm from a concave lens of focal length 15 cm. What is the nature of the image formed?

An object is placed 30 cm from a concave lens of focal length 15 cm. What is the nature of the image formed?

Step 1: Identify the type of lens. In this case, it is a concave lens.
Step 2: Note the distance of the object from the lens, which is 30 cm.
Step 3: Understand the focal length of the lens, which is -15 cm (concave lenses have a negative focal length).
Step 4: Recall that for a concave lens, the image formed is always virtual and erect when the object is placed in front of it.
Step 5: Conclude that since the object is in front of the concave lens, the image will be virtual and erect.

Lens Formula – Understanding the relationship between object distance, image distance, and focal length for lenses.
Image Characteristics – Identifying the nature (real/virtual) and orientation (erect/inverted) of images formed by concave lenses.