हबल समय कैलकुलेटर
हबल समय (1/H₀) की गणना करें।
Hubble Time
440,857,142,857,142,850.00 s
Hubble Time vs Hubble Constant (H0)
सूत्र
## The Hubble Time The Hubble time is the reciprocal of the Hubble constant, giving the time scale of the present expansion. ### Formula **t_H = 1 / H0** To convert, note that 1 km/s/Mpc = 1 / (3.086 x 10¹⁹ s). The Hubble radius c / H0 defines the distance at which the recession velocity equals the speed of light.
हल किया गया उदाहरण
H0 = 70 km/s/Mpc.
- 01t_H = 3.086e19 / H0
- 02t_H = 3.086e19 / 70 = 4.409e17 s
- 03In Gyr: 4.409e17 / 3.156e16 = 13.97 Gyr
- 04Hubble radius = c / H0 = 299800 / 70 ≈ 4283 Mpc
अक्सर पूछे जाने वाले प्रश्न
What is the Hubble radius?
The Hubble radius (or Hubble sphere) is the distance at which the recession velocity equals the speed of light: d_H = c / H0.
Is the Hubble time constant?
No. As the universe evolves the Hubble parameter changes, so the Hubble time changes too. The Hubble constant is its present-day value.
How does the Hubble time relate to the age of the universe?
For a matter-dominated universe the age is about 2/3 of the Hubble time. With dark energy the age is close to the Hubble time.