MCQ- 22 ICSE Physics class 10 ch-2 Light

Class 10 - Light Quiz (Focal Length Determination)

1. In the one pin method using an optical bench, the image formed is:

Real and Inverted
Virtual and Erect
Real and Erect
Virtual and Inverted

2. The focal length of a convex lens is measured by placing the pin at:

Twice the focal length
Half the focal length
At the principal focus
Beyond the focal length

3. In the optical bench method, the distance between the pin and lens is:

Equal to focal length
Twice the focal length
Less than the focal length
Unmeasurable

4. The plane mirror method for finding focal length uses:

The concept of image reversal
The concept of magnification
Refraction of light
Reflection of light

5. In the ray diagram for focal length determination, the principal axis is:

A horizontal reference line
A vertical reference line
The mirror surface
The focal point

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