Advertisements
Advertisements
प्रश्न
How does the light have to enter the glass:
for no refraction to happen?
Advertisements
उत्तर
For no refraction, the light ray has to enter the glass perpendicularly.
APPEARS IN
संबंधित प्रश्न
Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance?
With the help of a labelled ray-diagram, describe how a plane mirror forms an image of a point source of light placed in front of it. State the characteristics of the image formed in a plane mirror.
A man sits in an optician's chair looking into plane mirror which is 2 m away from him and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be?
If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?
A ray of light travelling in glass emerges into air. State whether it will bend towards the normal or away from the normal.
A ray of light goes from water into air. Will it bend towards the normal or away from the normal?
Name the phenomenon due to which a swimming pool appears less deep than it really is.
Why does a ray of light bend when it travels from one medium to another?
What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.
How does the light have to enter the glass:
to produce a large amount of bending?
Draw a diagram showing the refraction of a light ray from water to glass. Label on it the incident ray, the angle of incidence (/), and the angle of refraction (r)
A light ray suffers reflection and refraction at the boundary in passing from air to water. Draw a neat labelled ray diagram to show it.
A ray of light A incident from air suffers partial reflection and refraction at the boundary of water.
- Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
- How are the angles of incidence i and refraction r related?
A small air bubble in a glass block when seen from above appears to be raised because of ______.
List four characteristics of the image formed by a concave lens of focal length 20 cm when the object is placed at a distance of 40 cm from its optical centre.
Lights of different colours are used as signal for safety transport. From these, the wavelength of red light is _______ nm.
Write scientific reason.
The sun appears on the western horizon for some time after sunset.
Why does a ray of light bend when it travels from one medium to another?
A ray of light traveling in medium 1 strikes and travels into another transparent medium 2. If the speed of light is greater in medium 1, the ray will ______.
Assertion: The air bubble shines in water.
Reason: Air bubble shines due to the refraction of light.
