11PHYSICS ACTIVITY NO. 6 Refractive Index Of Glass By Total Internal Reflection

-

 


Aim: To determine refractive index of Glass by total internal reflection.

Apparatus: glass slab, plane white paper, laser pointer ,geometrical instrument box.


Result
Value of refractive index n = 1.33

MCQ

1. Total internal reflection happens when light travels from:

A. Air to glass
B. Glass to air
C. Vacuum to air
D. Water to glass
Answer: B

2. Total internal reflection occurs only when angle of incidence is:

A. Less than critical angle
B. Equal to critical angle
C. Greater than or equal to critical angle
D. Zero
Answer: C

3. The critical angle is the angle of incidence for which the angle of refraction is:

A. 90°
B. 0°
C. 45°
D. 180°
Answer: A

4. The refractive index of glass can be found using:

A. n=sin⁡cn = \sin c
B. n=1sin⁡cn = \frac{1}{\sin c}
C. n=cos⁡cn = \cos c
D. n=tan⁡cn = \tan c
Answer: B

5. Which tool provides a narrow straight beam of light?

A. Torch
B. Candle
C. Laser pointer
D. Bulb
Answer: C

6. A glass slab is an example of a:

A. Rarer medium
B. Denser medium
C. Magnetic material
D. Gas
Answer: B

7. During TIR, the light ray:

A. Bends into the air
B. Passes straight
C. Gets reflected inside the glass
D. Stops completely
Answer: C

8. Which surface is used to draw the path of the light ray clearly?

A. Black cloth
B. Rough wooden plank
C. White paper
D. Mirror
Answer: C

9. If the critical angle of glass is 42°, the refractive index is about:

A. 1.0
B. 1.5
C. 2.0
D. 0.5
Answer: B

10. When the angle of incidence increases, the refracted ray:

A. Goes away from the normal
B. Goes toward the normal
C. Stays the same
D. Disappears at small angles
Answer: A

 https://wordwall.net/resource/102433754




Quiz



Comments

Post a Comment

Popular posts from this blog

PHYSICS11 4.Laws Of Motion

-
Image
PHYSICS11  Chapter No 4.Laws O f Motion Newton's first law: Statement every inanimate object continuous to be in a state of rest or of uniform uniform motion along a straight line unless it is acted upon by an external unbalance force. Newton second law: statement The rate of change of linear momentum of a rigid body is directly proportional to the applied (external unbalanced) force and takes place in the direction of force. Newton's third law statement To every action there is always an equal and opposite reaction. Inertial frame of reference Inertial frame of reference is a frame of reference in which Newton's laws of motion are verified. Non inertial frame of reference A frame of reference in which Newton's laws of motion are not verified. Kinematics In Which motion describe without it's cause. Dynamics In Which motion describe along with its cause. Contact force The force experienced by a body due to Physical contact is called contact force. Non contact ...
Read more

12 physics Activity: To Study the Variation of Potential Drop

-
Image
  Activity: To Study the Variation of Potential Drop Along a Uniform Wire Using a Potentiometer Aim To study the variation of potential drop with length of a uniform wire and hence verify the principle of a potentiometer. Apparatus Required Potentiometer, driver cell (battery), rheostat, galvanometer, jockey, given cell, key, voltmeter (optional), connecting wires. Principle A potentiometer works on the principle that the potential drop across a uniform wire carrying steady current is directly proportional to its length . Mathematically: V ∝ l or V = k l where: V = potential drop l = length of wire k = potential gradient (potential drop per unit length) Theory When a steady current flows through a uniform potentiometer wire, the potential drop along the wire is uniform. Using the null deflection method, the potential difference across a cell can be measured accurately without drawing any current from it. This ensures high accuracy. The principle is verified by showing that the rati...
Read more