SCES3383 - Physics

A microscope is an instrument that...

• makes faraway objects look closer.

• make small objects appear larger

• decreases the size of small objects.

• increases the size of small objects.

Reflection telescopes use ________ to focus light.

• Lenses

• Flat mirrors

• Curved Mirrors

• Fiber optics cable

Diagram shows a glass block is placed in front of a pen. The pen appears bent is due to...

• the reflection of light

• the total reflection of light

• the scattering of light

• the refraction of light

Diagram shows a light ray directed normally to PQ of a glass prism. Given that the refractive index of the prism is 1.50

Which path A, B, C and D shows the correct propagation of light after passing PR?

• A

• B

• C

• D

The speed of light in vacuum is 3 x 10⁸ m s^-1. When the light penetrates a glass window, its speed becomes 1.86 x 10⁸ m s^-1.

What is the refractive index of the glass window?

• 0.62

• 1.51

• 1.61

• 2.92

Diagram shows a light ray, K, directed into a glass block. The critical angle of the glass is 42^o. In which direction does the light move from point O?

• P

• Q

• R

• S

Diagram 17 shows a light ray, P is directed to the centre, O of semicircular glass block. Refractive index of the glass is 1.52.

At which direction A, B, C or D does the light propagate after point O?

• A

• B

• C

• D

Illustrate the direction of light when it moves.

Total internal reflection occurs when incident angle is ___________ critical angle.

• greater than

• smaller than

• equal than

There are few example of application and innovation which is ____________

• Laser

• Fiber Optic

• Remote Sensing

• Microwave