Refraction through a Rectangular Glass Slab

Q. Explain refraction of light.

Q. When a ray of light passes from one medium to another medium, the angle incidence is always different from the angle of refraction.

1. True
2. False

Q.

Question 20 (d)

Boojho planned an activity to observe an object A through pipes as shown in the figure, so that he could see objects which he could not directly see.



Indicate the direction of rays in the figure.

Q. Explain refraction of light.

Q.

The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown in figure below. Which one of them is correct?

1. 

2. 

3. 

4. 

Q. A stamp placed under a thick glass block appears raised. Give reason.

Q.

A lens can be considered as a combination of different sections of

1. grating

2. prism

3. glass

4. mirror

Q.

Refraction

Q.

After refraction through a rectangular glass slab the emergent ray is

1. collinear to incident ray.

2. totally internally reflected.

3. perpendicular to incident ray.

4. parallel to incident ray.

Q.

In the given figure, when light emerges from the glass slab, the light ray bends:

1. left of normal AB

2. right of normal AB

3. on the normal AB

4. cannot be determined

Q. A light passing through a point A of a convex lens undergoes zero deviation after refraction. Identify point A.

1. Pole
2. Focus
3. Centre of Curvature
4. Optical Center

Q. The diagram in figure shows a ray of light AO falling on a rectangular glass slab PQRS. Complete the diagram till the ray of light emerges out of the slab. Label on the diagram the incident ray, the refracted ray and the emergent ray. $\left[2\text{Marks}\right]$

Q.

If light had the same speed in air and in glass, light will not get refracted while entering glass from air.

1. Yes

2. No

Q.

If the light had the same speed in air and in the glass, it will not get refracted while entering glass from the air.

1. Yes

2. No

Q. What do you mean by:
(i) Ray of light
(ii) Beam of light [2 MARKS]

Q.

Ram who is living on earth sees a pink coloured creature named Vijay with a telescope on an alien planet named Pinky celebrating his 58th birthday. The light from the Pinky takes 1 year to reach earth. What is the actual age of Vijay? [2 MARKS]

Q. why cant we or any other objecct travel at the speed of light

Q. Why does refraction occur?

Q.

is emergent ray also the refracted ray?

Q. Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.
$\left(i\right)$ What change is observed in the appearance of the pencil?
$\left(ii\right)$ Name the phenomenon responsible for the change.
$\left(iii\right)$ Draw a ray diagram showing how the eye sees the pencil?

Q. Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box?

1. A convex lens
2. A concave lens
3. A rectangular glass slab
4. A prism