Optics MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
Master Optics with Expert Online Physics Exams
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The distance from the optical center to the principal focus of a lens is known as the:
A. Focal length
B. Radius of curvature
C. Optical power
D. Refractive index
Answer: Focal length
A concave mirror can produce:
A. Real and virtual images
B. Only real images
C. Only virtual images
D. No images
Answer: Real and virtual images
The point where all the reflected rays converge in a concave mirror is called the:
A. Real focus
B. Virtual focus
C. Optical center
D. Principal axis
Answer: Real focus
The angle of deviation of light in a prism depends on:
A. The angle of the prism
B. The color of the light
C. The thickness of the prism
D. The temperature of the prism
Answer: The angle of the prism
The ability of a lens to form a clear image depends on its:
A. Focal length
B. Color
C. Shape
D. Material
Answer: Focal length
A convex lens is thicker at the center than at the edges. True or False?
A. True
B. False
Answer: True
The dispersion of light through a prism is a result of:
A. Different wavelengths of light bending by different amounts
B. Light reflecting off the surface of the prism
C. Light traveling through a uniform medium
D. Light being absorbed by the prism
Answer: Different wavelengths of light bending by different amounts
In a convex lens, parallel rays of light converge to a point called the:
A. Focus
B. Virtual focus
C. Optical center
D. Principal axis
Answer: Focus
The refractive index of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in the medium. True or False?
A. True
B. False
Answer: True