Science Chapter 7-8

A boy standing 2 m in front of a plane mirror. Then, the mirror is moved 1 m further away from the boy. What is the distance between the boy and his new image now?

• 2 m

• 3 m

• 4 m

• 6 m

Which is not a characteristics of the image formed on a plane mirror?

• Upright

• Laterally inverted

• Diminished

• A virtual image

Figure 2 shows a light ray reflected from a plane mirror at 30° from the mirror.
What is the angle of incidence?

• 30°

• 45°

• 60°

• 90°

Which of the following shows the correct reflected light rays by a convex mirror where F is the focal point and C is the center of the curvature?

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Figure 3 shows an object is placed in front of a concave mirror. The distance of the object from the mirror is less than the focal length of the mirror.

What are the characteristics of the image formed?

• Real, inverted and magnified

• Real, inverted and diminished

• Virtual, upright and magnified

• Virtual, upright and diminished

Which of the following does not apply the principle of the light reflection?

• Periscope

• Reeflecting telescope

• Spectacules

• Dentist mirror

Bending of the light as it passes from one medium to another is called

• reflection

• diffraction

• refraction

• deflection

Which statement is true about a light ray traveling towards a glass block from the air?

• The incidence angle is the same as the reflected angle.

• The light ray travels slower in the glass block.

• The light ray bends away from the normal.

• The light ray disperses into seven colors in the glass block.

Why does a light ray refract when it travels through different media?

• Its speed changes.

• Its density changes.

• Light travels very fast.

• Its brightness changes.

What will happen to a light ray that is incident direct perpendicular to a rectangular glass block?

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