Question
Lens is made up of
βSolution
Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet lens because of their compensating optical properties, which reduces chromatic aberration (colour defects).Β
Bus P takes 30 minutes to cover a distance of 60 km. If bus Q is 20% faster than bus P. Find the time taken by bus Q to cover the same distance?
A car typically takes 15 hours to cover a distance of 240 km. However, after traveling 47.5% of the total distance at its usual speed, the car's speed ...
A boy goes to school with a speed of 70 km/h and comes back with a speed of 30 km/h. find his average speed?
Ajay and Vishal left the place βXβ with different speeds which are in the ratio 5:3 respectively. Ajay left the place 36 seconds after Vishal. If af...
X started to run from point βAβ to βBβ at a speed of 21 km/hr at 9:00 am and Y started to run from point βBβ to βAβ at a speed of 18 km/...
1470 metres long train crosses a man who is moving in the same direction with a certain speed, in 30 seconds. If the same train can cross a tree in 7 se...
- Karan walks at a steady pace of 12 km/h and covers a certain distance in 10 hours. What speed must he maintain to complete the same journey in 6 hours?
A motor-cycle covers 140 km with a speed of 40 km/hr. find the speed of the motor-cycle for the next 140 km journey so that the average speed of the who...
A bike covers a certain distance in 1.8 hours while moving at a speed of 80 km/h. Later, due to traffic, the speed decreases and it takes 2 hours to cov...
- Asha travels 40.5 km in 1 hour and 30 minutes. How far will she travel in 4 hours if her speed increases by 3 km/h?