Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Frequency of vibration of a stretched string can be increased by:
1. By increasing the tension in the string.
2. By decreasing the length of the string.
संबंधित प्रश्न
When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.
- perpendicular
- parallel
- opposite
- concurrent
Choose the correct alternative and rewrite the following sentence.
A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?
Draw the diagram given below and clearly show the path taken by the emergent ray.
A ray of light is passing from a transparent medium 1 to another transparent medium 2 (i) Speed up (ii) slows down. In each case, state whether the refractive index of medium 2 is equal to, less than or greater than the refractive index of medium 1.
Fill in the blanks to complete the following sentence
When light travels from a denser to a rarer medium, its speed ……………….
Fill in the blank to complete the following sentence:
When light travels from a rarer to a denser medium, it bends ...........
A glass slab is placed over a page on which the word VIBGYOR is printed with each letter in its corresponding colour.
- Will the image of all the letters be in the same place?
- If not, the state which letter will be raised to the maximum. Give a reason for your answer.
How is the refractive index of a medium related to its real depth and apparent depth?
Explain with the help of a diagram of how fish is able to see the objects above it.
