Light 2

The diagram shows a single ray of light being directed at a plane mirror. What are the angles of incidence and reflection, respectively?

• 40^o, 40^o

• 40^o, 50^o

• 50^o, 40^o

• 50^o, 50^o

Which of the following diagrams show the correct ray diagram of how the submerged portion of the stick is observed in water?

• A

• B

• C

• D

The diagram below shows the path of a ray of light incident on the boundary between liquid and air. Given that the speed of light in air is 3.0 x 10⁸ m/s, what is the speed of the light in the liquid?

• 2.2 x 10⁸ m/s

• 2.7 x 10⁸ m/s

• 3.4 x 10⁸ m/s

• 4.0 x 10⁸ m/s

Light is shone onto a transparent plastic block in air, as shown in the diagram. Which correctly identifies the angle of incidence and angle of refraction respectively?

• e, g

• e, h

• f, g

• f, h

A ray of light meets the face of a glass block at an angle of 30^o as shown. The refractive index of the glass is 1.5. What is the angle of refraction r inside the glass block?

• 19^o

• 20^o

• 35^o

• 40^o

The diagram shows an object O placed in front of a plane mirror. Which is the image seen in the mirror?

• A

• B

• C

• D

A ray of light travels from vacuum into glass. What is the refractive index of the glass?

• sin a/sin d

• sin c/sin b

• v₁/v₂

• v₂/v₁

The diagram shows a ray of light reflected by a plane mirror. The diagram is not drawn to scale. What is the angle of reflection?

• 25^o

• 35^o

• 55^o

• 70^o

The diagram shows a ray of light incident to a glass block of refractive index 1.35 at an angle of incidence of 45^o. What will happen to the light ray?

• It will enter the glass block and bend away from the normal.

• It will enter the glass block and bend towards the normal.

• It will refract and travel along the air glass boundary.

• It will undergo total internal reflection.

When a plane mirror is moved nearer to an object, how will the distance between the mirror and its image change?

• It will increase

• It will decrease

• It will remain the same

• It will increase and then decrease.