Lens and Optics - Abbas

The angle of incidence is equal to:

• Angle of deviation
• Angle of reflection
• Angle of refraction
• 90°

In reflection, the incident ray, reflected ray, and normal lie:

• In different planes
• In opposite planes
• In the same plane
• At random

Snell’s Law is given by:

• n = 1/f
• v = u + at
• n1 sinθ1 = n2 sinθ2
• None

In refraction, light bends toward the normal when it enters:

• A rarer medium
• A denser medium
• Air
• Vacuum

Light always travels in:

• Circular path
• Curved path
• Straight line
• None

Which of the following forms a virtual and erect image only?

• Plane mirror
• Convex mirror
• Concave lens
• All of the above

Concave mirror is also known as:

• Converging mirror
• Diverging mirror
• Neutral mirror
• Reflecting lens

Real images are always:

• Erect
• On the same side of the object
• Formed on a screen
• Always virtual

A convex lens is:

• Thinner at center
• Thicker at center
• Flat on both sides
• Reflective

Image formed by convex mirror is always:

• Real and inverted
• Virtual and erect
• Real and erect
• None